[llvm] [AMDGPU][RFC] Combine asm and disasm tests. (PR #92895)

[Ivan Kosarev via llvm-commits]

kosarev wrote:

Another attempt, after https://github.com/llvm/llvm-project/pull/90179 and https://github.com/llvm/llvm-project/pull/90214.

We seem to use sed a lot in tests and I guess could even have a lit substitution, locally for AMDGPU or otherwise.

https://github.com/llvm/llvm-project/pull/92895