C#: tests in CI are disabled

[alexcrichton]

In #1699 I'm disabling testing with C# due to failures building tests.

An example failure with wasi-sdk-29 is here:

---- tests/runtime/rust/dylibs/runner.rs ----
  component: runner
  path: tests/runtime/rust/dylibs/runner.rs
  error: failed to compile component "tests/runtime/rust/dylibs/runner.rs"
  
  Caused by:
      command execution failed
      command: BINDINGS="/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/dylibs/runner-rust/bindings/runner.rs" CARGO_MANIFEST_DIR="tests/runtime/rust/dylibs" "rustc" "--edition=2021" "--target" "wasm32-wasip2" "-Dwarnings" "-Cdebuginfo=1" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/deps" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/quote-53a208424db1e1d7" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/serde_core-0ecc340f22280655" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/proc-macro2-6955ed29c3acce69" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/anyhow-ce8ecf614e24fd86" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/zmij-5e4b739506ce1fa0" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/serde_json-2bddfa072642257e" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/serde-8c4981138e2ed61c" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/prettyplease-3bdb7e6f3ad61c08" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/deps" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/wit-bindgen-rust-ea4e7d82dea7c074" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/wit-bindgen-rust-macro-b2978fab7bdd55a9" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/debug/build/wit-bindgen-a11e78330ba53fc2" "-Ldependency=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug" "-Lnative=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/build/wit-bindgen-41a5941b58e7a593/out" "--extern=wit_bindgen=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/libwit_bindgen.rlib" "--extern=wit_bindgen=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/deps/libwit_bindgen-83c4ea851fcc31f6.rmeta" "--extern=futures=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/libfutures.rlib" "--extern=futures=/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/deps/libfutures-b27c7f5ef205c54f.rmeta" "tests/runtime/rust/dylibs/runner.rs" "-o" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/dylibs/runner-rust.core.wasm" "-Clink-arg=-shared" "-Clink-self-contained=n" "-Clinker=/opt/hostedtoolcache/wasi-sdk-29.0-x86_64-linux/bin/clang" "-L" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/dylibs/runner-rust" "--crate-type=cdylib" "-Clink-arg=-Wl,--skip-wit-component"
      status: exit status: 1
      stderr:
        error: linking with `/opt/hostedtoolcache/wasi-sdk-29.0-x86_64-linux/bin/clang` failed: exit status: 1
          |
          = note:  "/opt/hostedtoolcache/wasi-sdk-29.0-x86_64-linux/bin/clang" "-Wl,--no-export-dynamic" "-Wl,--export" "-Wl,run" "-Wl,--export" "-Wl,cabi_realloc" "-Wl,-z" "-Wl,stack-size=1048576" "-Wl,--stack-first" "-Wl,--no-demangle" "<2 object files omitted>" "-ldylib_dep" "<sysroot>/lib/rustlib/wasm32-wasip2/lib/libpanic_abort-*.rlib" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/libwit_bindgen.rlib" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/deps/{libfutures-b27c7f5ef205c54f,libfutures_executor-922299a107bb047a,libfutures_util-9dc6196014b01a3f,libmemchr-42aea3167221f1c8,libfutures_io-8f5dbb637f9af8fd,libslab-e7bcb3e3d56d11ea,libfutures_channel-e0220edc4c5fb7be,libpin_project_lite-6a517c497ca1cc61,libfutures_sink-47a2cb5e9ef840c0,libfutures_task-df6ab379a1a807af,libfutures_core-f82a2f8330c0d626,libbitflags-860f6eb07a090227}.rlib" "<sysroot>/lib/rustlib/wasm32-wasip2/lib/{libstd-*,libwasip2-*,libwit_bindgen-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*}.rlib" "-lc" "<sysroot>/lib/rustlib/wasm32-wasip2/lib/{librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "--target=wasm32-wasip2" "-L" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/rust/wit-bindgen/target/wasm32-wasip2/debug/build/wit-bindgen-41a5941b58e7a593/out" "-L" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/dylibs/runner-rust" "-o" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/dylibs/runner-rust.core.wasm" "-Wl,--gc-sections" "-static" "-shared" "-nodefaultlibs" "-shared" "-Wl,--skip-wit-component"
          = note: some arguments are omitted. use `--verbose` to show all linker arguments
          = note: wasm-ld: warning: creating shared libraries, with -shared, is not yet stable
                  PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
                  error: failed to invoke LLD: signal: 11 (SIGSEGV) (core dumped)
                  clang: error: linker command failed with exit code 1 (use -v to see invocation)
                  
        
        error: aborting due to 1 previous error
        
        


failures:
    tests/runtime/rust/dylibs/runner.rs

an example failure with wasi-sdk-32 is here

---- tests/runtime/variants/test.cs ----
  component: test
  path: tests/runtime/variants/test.cs
  error: failed to compile component "tests/runtime/variants/test.cs"
  
  Caused by:
      command execution failed
      command: cd "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings" && "/usr/share/dotnet/dotnet" "publish" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj" "-r" "wasi-wasm" "-c" "Debug" "/p:PlatformTarget=AnyCPU" "/p:MSBuildEnableWorkloadResolver=false" "--self-contained" "/p:UseAppHost=false" "-o" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/csharp-testcase"
      status: exit status: 1
      stdout:
          Determining projects to restore...
          Restored /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj (in 1.28 sec).
          TestWorld -> /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/bin/Debug/net10.0/wasi-wasm/csharp-testcase.dll
        /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/.packages/microsoft.dotnet.ilcompiler.llvm/10.0.0-rc.1.26357.1/build/Microsoft.NETCore.Native.Wasm.targets(48,5): warning : Wasi SDK version 33.0+m is being used. This differs from the expected 29.0 and might result in build or runtime failures. [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
          Generating native code
          LLVM compilation to IR finished in 6.14 seconds
          LLVM generation of bitcode finished in 0.62 seconds
          LLVM generation of debug info finished in 0.11 seconds
          Object writing finished in 0.64 seconds, allocated 36.63 MB
        wasm-ld : error : --global-base cannot be less than stack size when --stack-first is used [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
        EXEC : error : failed to invoke LLD: exit status: 1 [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
        clang : error : linker command failed with exit code 1 (use -v to see invocation) [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
        /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/.packages/microsoft.dotnet.ilcompiler.llvm/10.0.0-rc.1.26357.1/build/Microsoft.NETCore.Native.targets(616,5): error MSB3073: The command ""/opt/hostedtoolcache/wasi-sdk-33.0-x86_64-linux/bin/clang" @obj/Debug/net10.0/wasi-wasm/native/link.rsp " exited with code 1. [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]

and example failure with wasi-sdk-34 is here

---- tests/runtime/variants/test.cs ----
  component: test
  path: tests/runtime/variants/test.cs
  error: failed to compile component "tests/runtime/variants/test.cs"
  
  Caused by:
      command execution failed
      command: cd "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings" && "/usr/share/dotnet/dotnet" "publish" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj" "-r" "wasi-wasm" "-c" "Debug" "/p:PlatformTarget=AnyCPU" "/p:MSBuildEnableWorkloadResolver=false" "--self-contained" "/p:UseAppHost=false" "-o" "/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/csharp-testcase"
      status: exit status: 1
      stdout:
          Determining projects to restore...
          Restored /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj (in 1.28 sec).
          TestWorld -> /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/bin/Debug/net10.0/wasi-wasm/csharp-testcase.dll
        /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/.packages/microsoft.dotnet.ilcompiler.llvm/10.0.0-rc.1.26357.1/build/Microsoft.NETCore.Native.Wasm.targets(48,5): warning : Wasi SDK version 33.0+m is being used. This differs from the expected 29.0 and might result in build or runtime failures. [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
          Generating native code
          LLVM compilation to IR finished in 6.14 seconds
          LLVM generation of bitcode finished in 0.62 seconds
          LLVM generation of debug info finished in 0.11 seconds
          Object writing finished in 0.64 seconds, allocated 36.63 MB
        wasm-ld : error : --global-base cannot be less than stack size when --stack-first is used [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
        EXEC : error : failed to invoke LLD: exit status: 1 [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
        clang : error : linker command failed with exit code 1 (use -v to see invocation) [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]
        /home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/.packages/microsoft.dotnet.ilcompiler.llvm/10.0.0-rc.1.26357.1/build/Microsoft.NETCore.Native.targets(616,5): error MSB3073: The command ""/opt/hostedtoolcache/wasi-sdk-33.0-x86_64-linux/bin/clang" @obj/Debug/net10.0/wasi-wasm/native/link.rsp " exited with code 1. [/home/runner/work/wit-bindgen/wit-bindgen/target/artifacts/variants/test-csharp/bindings/TestWorld.csproj]

cc @yowl