[libcxx-commits] [libcxx] [libc++] Implement LWG4072: std::optional comparisons: constrain harder (PR #209968)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja requested changes to this pull request.

Finally, let's change this line as the following.
https://github.com/llvm/llvm-project/blob/da9625ca5a1517ec21224e3467be3ff250887061/libcxx/docs/Status/Cxx26Issues.csv#L90

```
"`LWG4072 <https://wg21.link/LWG4072>`__","``std::optional`` comparisons: constrain harder","2024-11 (Wrocław)","|Complete|","24","`#118345 <https://github.com/llvm/llvm-project/issues/118345>`__",""
```

> As required by the LLVM Project's AI use policy:
> - The fix and test processes were revised and verified with AI assistance.

Also, is there any part of this PR still using the original AI generation? If no, let's drop this from the PR description which will be used as squashed commit message by default.

https://github.com/llvm/llvm-project/pull/209968