[clang] [analyzer] Improve dangling value tracking in DanglingPtrDeref (PR #211818)

[Benedek Kaibas via cfe-commits]

benedekaibas wrote:

@isuckatcs I think if you are fine with the changes we can merge this PR. It already got two approvals and the only requirement before merging was solving your comment: https://github.com/llvm/llvm-project/pull/211818#discussion_r3655698635. If everything looks good to you I will merge it.

https://github.com/llvm/llvm-project/pull/211818