[llvm] [libc][bazel] simplify type_traits with glob (PR #94079)

[Joseph Huber via llvm-commits]

https://github.com/jhuber6 commented:

I know in CMake globs are problematic because adding a new file to the directory doesn't trigger a rebuild. However I'm assuming Bazel doesn't carry the same limitations and it's probably not an issue for headers.

https://github.com/llvm/llvm-project/pull/94079