[llvm] [ctxprof] Don't lower instrumentation for `noreturn` functions (PR #134932)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

### Merge activity

* **Apr 8, 5:44 PM EDT**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/134932).


https://github.com/llvm/llvm-project/pull/134932