[clang] [LifetimeSafety] Make the dataflow analysis generic (PR #148222)

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

### Merge activity

* **Jul 16, 2:12 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/148222).


https://github.com/llvm/llvm-project/pull/148222