[llvm] AMDGPU: Remove FeatureCvtFP8VOP1Bug from gfx950 (PR #117827)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Nov 27, 1:23 AM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/117827).


https://github.com/llvm/llvm-project/pull/117827