[llvm] llvm-reduce: Fix overly conservative operands-to-args user restriction (PR #133854)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Apr 10, 1:08 AM EDT**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/133854).


https://github.com/llvm/llvm-project/pull/133854