[clang] [clang-cl][AST] Fix auto NTTP MSVC 1920+ mangling for pointer types (PR #92477)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic approved this pull request.

LGTM

Your commit message mentions variables, function pointers, and member function pointers...  is there anything else we need to handle?  Null pointers?  Integers?

https://github.com/llvm/llvm-project/pull/92477