[llvm] [FixIrreducible] Use reportFatalUsageError for unsupported terminators (PR #205244)

[Arda Serdar Pektezol via llvm-commits]

https://github.com/pektezol commented:

LGTM

I don't have commit access, so this requires an approval from a maintaner.

https://github.com/llvm/llvm-project/pull/205244