[llvm] IR/AMDGPU: Autoupgrade amdgpu-unsafe-fp-atomics attribute (PR #101698)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Aug 12, 6:55 AM EDT**: @arsenm started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/101698).


https://github.com/llvm/llvm-project/pull/101698