[clang] [LifetimeSafety] Warn on incorrectly placed `[[clang::lifetimebound]]` attributes (PR #196144)

[Utkarsh Saxena via cfe-commits]

https://github.com/usx95 commented:

Overall LG.

We are missing to verify `lifetimebound` for implicit this arg, this only targets function parameters atm. I am doing that in a separate PR.

https://github.com/llvm/llvm-project/pull/196144