Port 2bc52ff7

Original Commit Message:

    Implement i32x4.dot_i16x8_s for Liftoff on on ia32 and x64.
    ARM implementation will come later.

R=zhin@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I2cc3afe63802aa00b8e5e7dcfb710c49d1486a90
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2484337Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#70611}