[clang] [Analyzer][CFG] Correctly handle rebuilt default arg and default init expression (PR #91879)

[via cfe-commits]

yronglin wrote:

Thanks for your review! The CI did passed(https://buildkite.com/llvm-project/github-pull-requests/builds/66630) but not shown on github for whatever reason.

https://github.com/llvm/llvm-project/pull/91879