[llvm-branch-commits] [llvm] [LLVM] Make crashing tests with not use --crash (PR #174297)

[Alexander Richardson via llvm-branch-commits]

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

Is the problem that internal shell `not` only checks for non zero exit but fails with signal exits? 

Maybe that behaviour is actually better since we now need to use --crash for signal exits? But no strong opinion either way. 

https://github.com/llvm/llvm-project/pull/174297