[clang] [LifetimeSafety] Fix handling of reference-type DeclRefExpr (PR #176728)

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

### Merge activity

* **Jan 19, 12:51 PM UTC**: [Graphite](https://app.graphite.com/github/pr/llvm/llvm-project/176728) rebased this pull request as part of a merge.


https://github.com/llvm/llvm-project/pull/176728