[clang] [LifetimeSafety] Track moved declarations to prevent false positives (PR #170007)

[Gábor Horváth via cfe-commits]

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

I think this is an improvement and we should land but we should figure out what to do with `std::move(cond?a:b)` style code. 

https://github.com/llvm/llvm-project/pull/170007