[llvm] llvm-reduce: Avoid using constantdata uselistorder in thinlto test (PR #136288)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Apr 18, 9:32 AM EDT**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/136288).


https://github.com/llvm/llvm-project/pull/136288