[clang] [LifetimeSafety] Trace assignment history for use-after-scope errors (PR #188467)

[Gábor Horváth via cfe-commits]

https://github.com/Xazax-hun commented:

Made some drive by comments, not a full review.

Did you use any AI tool to generate some of the code?

As per LLVM's AI policy, you need to disclose that in the PR description: https://llvm.org/docs/AIToolPolicy.html

https://github.com/llvm/llvm-project/pull/188467