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

[via cfe-commits]

NeKon69 wrote:

I will create a separate test file as we do for testing noescape attributes already, since the warnings do not appear with just -Wlifetime-safety.

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