[clang] [HIP] Replace use of `llvm-mc` with `clang` (PR #112041)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> This seems to be failing all of the precommit CI pipelines in Clang:
> 
> https://buildkite.com/llvm-project/github-pull-requests/builds/109413#01928af0-a546-4bf9-bd4c-a229b8ebc005
> 
> Can this be fixed or reverted?

I'm confused, that test was modified in this patch and no longer contains the `llvm-mc` check line it's failing on.

https://github.com/llvm/llvm-project/pull/112041