[clang] [NFC][analyzer] Replace BlockInCriticalSection MutexDescriptor with C… (PR #224230)

[Balázs Benics via cfe-commits]

https://github.com/steakhal commented:

I love it. Needs a bit of refinement but going this way relieves my biggest pain point with this check. Thank you!

https://github.com/llvm/llvm-project/pull/224230