[llvm] [ScalarizeMaskedMemIntrin] Preserve metadata during scalarization (PR #218753)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/155/builds/23092

<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: 70.39s

Total Discovered Tests: 69867
  Skipped          : 40161 (57.48%)
  Unsupported      : 25474 (36.46%)
  Passed           :  4217 (6.04%)
  Expectedly Failed:    15 (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/218753