[clang] [clang][CodeGen][MSVC] Return vector types from methods indirectly (PR #157365)

[Mariya Podchishchaeva via cfe-commits]

https://github.com/Fznamznon commented:

Hi, thank you for the patch. I wonder if it can make clang ABI incompatible with its previous versions? Perhaps it makes sense to put the new behavior under `-fclang-abi-compat` flag.

https://github.com/llvm/llvm-project/pull/157365