Recent nightlies broke tuple-reflection

[teor2345]

Recent nightlies removed the metadata from TypeKind::Tuple:
https://doc.rust-lang.org/nightly/core/mem/type_info/enum.TypeKind.html

This breaks code like:

overloading-examples/tuple-reflection/src/main.rs

Line 70 in 4b15668

let TypeKind::Tuple(info) = Type::of::<A>().kind else {

cc @bushrat011899