[llvm] AMDGPU: Add baseline test for vectorize of integer min/max (PR #100513)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Jul 25, 4:25 PM EDT**: @arsenm started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/100513).


https://github.com/llvm/llvm-project/pull/100513