[clang] [TBAA] Emit distinct TBAA tags for pointers with different depths,types. (PR #76612)

[Florian Hahn via cfe-commits]

fhahn wrote:

Rebased, updated and added option to disable this (`-fno-pointer-tbaa`). I think this would be ready for a review now :) 

https://github.com/llvm/llvm-project/pull/76612