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

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

> I have narrowed it down to the usage of -Weverything.
> Is that intended behaviour, does -Wexperimental-lifetime-safety gets enabled by that?

Yes. I am trying to have a different option to enable this analysis other instead of the warning -Wexperimental-lifetime-safety in https://github.com/llvm/llvm-project/pull/149592 to not break `-Weverything` users.

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