[clang] [PAC][clang] Implement address/type discrimination for VTT vtable pointers (PR #205808)

[Kristina Bessonova via cfe-commits]

chbessonova wrote:

@ojhunt Thank you! I currently don't have commit access anymore after being away from work for a while, and I'm not sure yet how to get it restored. So, I'd be happy if you could commit it for me. Let me know whether you need me to rebase the patch (as far as I can see github states the patch can be merged right now).

https://github.com/llvm/llvm-project/pull/205808