[InstCombine] Pull shuffles out of binops with splatted ops#137948

lukel97 merged 5 commits intollvm:mainllvm/llvm-project:mainfrom

lukel97:instcombine/foldVectorBinop-shuffle-scalablelukel97/llvm-project:instcombine/foldVectorBinop-shuffle-scalableCopy head branch name to clipboard