[VPlan] Omit zero add in VPWidenIntOrFpInductionRecipe#119668

lukel97 merged 3 commits intollvm:mainllvm/llvm-project:mainfrom

lukel97:loop-vectorize/remove-add-getStepVectorlukel97/llvm-project:loop-vectorize/remove-add-getStepVectorCopy head branch name to clipboard