[x64] Transform setcc + movzxbl into xorl + setcc

xorl + setcc is more efficient than setcc + movzxbl and encodes one byte
shorter.

Change-Id: Ib6679ce9ab0ac0d34701daba5c3d4d8bb57a8fc6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3492946


Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Hao A Xu <hao.a.xu@intel.com>
Cr-Commit-Position: refs/heads/main@{#79377}