[llvm] [profcheck][SimplifyCFG] Propagate !prof from `switch` to `select` (PR #159645)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

### Merge activity

* **Sep 26, 9:15 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/159645).


https://github.com/llvm/llvm-project/pull/159645