[clang] [clang][analyzer] Check for label location bindings in `DereferenceChecker` (PR #91119)

[Donát Nagy via cfe-commits]

https://github.com/NagyDonat approved this pull request.

LGTM.

My only significant observation is that `BugReporterVisitors.cpp` must be cleaned up eventually, as it is currently a heap of ad-hoc special cases. However, it would be unreasonable to wait for that difficult cleanup with this simple improvement, so it's reasonable that you add yet another special case that ensures that your example works as intended. 

https://github.com/llvm/llvm-project/pull/91119