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

[Gábor Horváth via cfe-commits]

https://github.com/Xazax-hun approved this pull request.

Overall looks good to me. One question for the future: sometimes it might be better to run certain analyses side by side in the same worklist rather than running them sequentially after each other. Do you think there are some analysis steps that will be beneficial to be combined in that way?

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