[clang] [analyzer] Remove some false negatives in StackAddrEscapeChecker (PR #125638)

[Michael Flanders via cfe-commits]

Flandini wrote:

@steakhal, looks like the premerge checks built with clang 20 https://buildkite.com/llvm-project/github-pull-requests/builds/145477#0194f106-3262-4d2b-922c-b3810220acd1/6-4595. I build locally with clang 18. 

This type of error is caught by g++, not clang++: https://godbolt.org/z/7Y445Pn13.

These failed CI builds/tests look like they are built with gcc/g++ maybe? Some explicitly invoke g++, others call `/usr/bin/c++`


https://github.com/llvm/llvm-project/pull/125638