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

[Joe Nash via llvm-commits]

https://github.com/Sisyph commented:

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

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