[llvm] [llvm][EmbedBitcodePass] Pre-commit test for using WPD with FatLTO (PR #139998)

[Paul Kirth via llvm-commits]

ilovepi wrote:

### Merge activity

* **May 29, 5:24 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/139998).


https://github.com/llvm/llvm-project/pull/139998