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

[Gábor Horváth via cfe-commits]

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

I think this is going in the right direction but I'd love to see more tests and some more thought about some scenarios. 

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