[clang] [llvm] [DXIL] Remove incompatible metadata types when preparing DXIL. (PR #136386)

[Justin Bogner via cfe-commits]

https://github.com/bogner commented:

This looks pretty good, but the test needs to also cover the positive cases. We should show that dx.nonuniform and MD_range, for example, are *not* removed. This can probably be done in the same test file unless you think it's worthwhile to split it up.

https://github.com/llvm/llvm-project/pull/136386