[clang] [win][clang] Align scalar deleting destructors with MSABI (PR #139566)

[Tom Honermann via cfe-commits]

https://github.com/tahonermann requested changes to this pull request.

Thanks for working on this @Fznamznon! I added some suggestions and comments, most of which are minor. There are two concerns that must be addressed.
- The ABI impact suggests this change should be tied to `-fclang-abi-compat=` as has already been discussed.
- AST serialization support is needed for the new  `OperatorGlobalDelete` member of `CXXDestructorDecl`.

https://github.com/llvm/llvm-project/pull/139566