Optimizations to use fast memmove to move elements are preserved, as
well as heuristics for bailout to the runtime if left or right
trimming is desired.

Bug: v8:7672
Change-Id: I01ffc1143b63d705d99a40eab3a7e873596d0aa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1499495
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60118}