[clang] [CIR] Find conditional cleanups in implicit code (PR #229829)

[Erich Keane via cfe-commits]

https://github.com/erichkeane approved this pull request.

I'm still moderately concerned about lambdas, only checking capture inits seems like it we might be missing something, but I don't have any examples at the moment, so I'll accept for now and we'll have to see if there is any fallout.

https://github.com/llvm/llvm-project/pull/229829