[llvm] [AMDGPU][MC] test update with script for gfx11/gfx12 mc test (PR #135527)

[Brox Chen via llvm-commits]

broxigarchen wrote:

> Can you please split this up a bit? Something like 3 patches
> 
> * run script with unique on files where it doesn't change the contents
> * run script on files where it removes duplicated tests
> * run script on files where it changes output lines

sure

https://github.com/llvm/llvm-project/pull/135527