[clang] [clang][analyzer] Improve BlockInCriticalSectionsChecker (PR #80029)

[Endre Fülöp via cfe-commits]

gamesh411 wrote:

As keeping the trivial change that this PR was before, and thanks to the fact that the checker needed a major overhaul, I have increased the scope of this change to support the use cases mentioned by @balazske.
That is why I am re-requesting a review.

https://github.com/llvm/llvm-project/pull/80029