This implements I32x4DotI16x8S for x64 and interpreter.

Bug: v8:10583
Change-Id: I404ac68c19c1686a93f29c3f4fc2d661c9558c67
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2229056Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68244}