[llvm] [llvm][CodeGen] respect booleanVectorContents while UnrollVSETCC (PR #97589)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon requested changes to this pull request.

Next step is to regenerate the changed test files and yak shave any regressions

https://github.com/llvm/llvm-project/pull/97589