[clang] [TBAA] Don't emit pointer-tbaa for void pointers. (PR #122116)

[John McCall via cfe-commits]

https://github.com/rjmccall commented:

Last minute re-read caught a couple slip-ups, and yeah, as mentioned, please feel free to augment this with other relevant information for users. Also, I'm definitely not sure the separate clang-cl section is worth keeping; it's pretty short, and any extra information in it should probably just be rolled into here.

https://github.com/llvm/llvm-project/pull/122116