[clang] [Sema] Add `-fvisibility-global-new-delete=` option (PR #75364)

[Fangrui Song via cfe-commits]

MaskRay wrote:

> I rebased the changes onto the latest main to resolve the merge conflicts - these were just textual not semantic.

You may like getcord/spr :)
https://maskray.me/blog/2023-09-09-reflections-on-llvm-switch-to-github-pull-requests#my-workflow

https://github.com/llvm/llvm-project/pull/75364