[clang] [llvm] [AMDGPU] Add v_cvt_scale_pk8_* gfx1250 instructions (PR #151616)

[Stanislav Mekhanoshin via llvm-commits]

rampitec wrote:

Something has changed on github yesterday. Testing takes time and during this time someone would commit something. Not necessarily related. Then github says its cannot merge it and the branch needs a merge. Then it starts testing again, rinse and repeat. It does not seem to work for a large project like this with a lot of contributors and activity.

https://github.com/llvm/llvm-project/pull/151616