[codex] cover dynamic import glob candidates

[andrewtdiz]

Part of #1674.

Scope

• Adds a Node parity fixture for directory-scoped dynamic import template literals.
• Covers finite candidate expansion through import(./fixtures/dynamic-glob/${name}.ts).
• Includes two local fixture modules so the test verifies both discovered candidates compile and run.

Non-goals

• No compiler/runtime changes.
• No package or bare-specifier wildcard support.
• No unbounded recursive glob behavior.
• No additional parameter type narrowing beyond the existing directory-scoped glob handling.

Validation

• npm exec --yes --package=node@26 -- node --experimental-strip-types test-parity/node-suite/module/loader/dynamic-import-glob-candidates.ts
• CARGO_BUILD_JOBS=1 CARGO_TARGET_DIR=/root/perry-worktrees/.build-targets/perry-dynamic-import-glob-build cargo build --release -p perry -p perry-runtime -p perry-stdlib
• PERRY_NO_AUTO_OPTIMIZE=1 /root/perry-worktrees/.build-targets/perry-dynamic-import-glob-build/release/perry test-parity/node-suite/module/loader/dynamic-import-glob-candidates.ts -o /tmp/perry_dynamic_import_glob && /tmp/perry_dynamic_import_glob
• PERRY_NO_AUTO_OPTIMIZE=1 CARGO_TARGET_DIR=/root/perry-worktrees/.build-targets/perry-dynamic-import-glob-build npm exec --yes --package=node@26 -- bash -lc './run_parity_tests.sh --suite node-suite --module module --filter dynamic-import-glob-candidates'
• PERRY_NO_AUTO_OPTIMIZE=1 CARGO_TARGET_DIR=/root/perry-worktrees/.build-targets/perry-dynamic-import-glob-build npm exec --yes --package=node@26 -- bash -lc './run_parity_tests.sh --suite node-suite --module module --filter dynamic-import'
• cargo fmt --all -- --check
• git diff --check
• ./scripts/check_file_size.sh