[clang] [clang][analyzer] fix false positive of BlockInCriticalSectionChecker (PR #127049)

[Balazs Benics via cfe-commits]

https://github.com/steakhal commented:

Looks pretty good. Thank you all for working on this.
It's heading in the right direction, although, I originally envisioned a different path getting this done - by using Bug report visitors.

https://github.com/llvm/llvm-project/pull/127049