[VPlan] Only store RecurKind + FastMathFlags in VPReductionRecipe. NFCI#131300

lukel97 merged 7 commits intollvm:mainllvm/llvm-project:mainfrom

lukel97:loop-vectorize/VPReductionRecipe-RecurKindlukel97/llvm-project:loop-vectorize/VPReductionRecipe-RecurKindCopy head branch name to clipboard