Delegate to macro assembler functions to pick between SSE or AVX. This
simplifies the optimization of constant shifts later.

Bug: v8:10115
Change-Id: If0b7dc83a68f2d7839c65527a3b6a62310ace6dd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2103443Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66753}