[clang] [clang] Diagnose dangling issues for the "Container<GSLPointer>" case. (PR #107213)

[Utkarsh Saxena via cfe-commits]

https://github.com/usx95 commented:

Thanks. This looks quite useful.

Since this is not limited to a hardcoded set of types/stl-containers,  this is a substantial change in the behaviour of general `Owner<Pointer> types` and warrants extra documentation both in GSL analysis docs and ReleaseNotes.

https://github.com/llvm/llvm-project/pull/107213