[clang] [llvm] [ConstraintElim] Add NUW for mul/shl with NSW and non-positive ops. (PR #219663)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx64-nvidia-win` running on `as-builder-8` while building `clang,llvm` at step 7 "test-build-unified-tree-check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/155/builds/23152

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 7 (test-build-unified-tree-check-llvm) failure: test (failure)
...

Testing Time: 71.99s

Total Discovered Tests: 69891
  Skipped          : 40745 (58.30%)
  Unsupported      : 25473 (36.45%)
  Passed           :  3659 (5.24%)
  Expectedly Failed:    14 (0.02%)

1 error(s) in tests
FAILED: [code=2] test/CMakeFiles/check-llvm C:/buildbot/as-builder-8/llvm-nvptx64-nvidia-win/build/test/CMakeFiles/check-llvm 
C:\Windows\system32\cmd.exe /C "cd /D C:\buildbot\as-builder-8\llvm-nvptx64-nvidia-win\build\test && C:\Python314\python.exe C:/buildbot/as-builder-8/llvm-nvptx64-nvidia-win/build/./bin/llvm-lit.py -vv C:/buildbot/as-builder-8/llvm-nvptx64-nvidia-win/build/test"
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/219663