[AArch64][SelectionDAG] Add type legalization for partial reduce wide adds#141075

NickGuy-Arm merged 7 commits intollvm:mainllvm/llvm-project:mainfrom

NickGuy-Arm:JamesChesterman/legal-partial-reduction/wideaddNickGuy-Arm/llvm-project:JamesChesterman/legal-partial-reduction/wideaddCopy head branch name to clipboard