[AArch64][SVE] Avoid redundant extend of unsigned i8/i16 extracts.#165863

rj-jesus wants to merge 3 commits intollvm:mainllvm/llvm-project:mainfrom

rj-jesus:rjj/aarch64-sve-redundant-extract-extendrj-jesus/llvm-project:rjj/aarch64-sve-redundant-extract-extendCopy head branch name to clipboard