[clang] [LifetimeSafety] Move GSL pointer/owner type detection to LifetimeAnnotations (PR #169620)

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

### Merge activity

* **Nov 26, 11:12 AM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.com/github/pr/llvm/llvm-project/169620).


https://github.com/llvm/llvm-project/pull/169620