[llvm] [AMDGPU][NFC] Enable gfx942 for more tests (PR #154363)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

Not every test that changes needs to run with 942, this can be more targeted.

I was hoping the original commit had a more targeted test, but 7900334dd530416b70fb04c8abb6f8c2c65da86d looks like a bunch of random test changes. The int_to_fp*s removed FIXMEs so those are probably more interesting.

https://github.com/llvm/llvm-project/pull/154363