[llvm] llvm-reduce: Avoid worklist in simplify-instruction (PR #134066)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Apr 2, 11:20 AM EDT**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/134066).


https://github.com/llvm/llvm-project/pull/134066