[lld] [PAC][lld] Test warning emitted for non-PAuth-marked files with `-z pac-plt` (PR #112958)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

### Merge activity

* **Nov 10, 1:05 AM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/112958).


https://github.com/llvm/llvm-project/pull/112958