Implement f64x2.add, i64x2.add, i8x16.add on ARM and ARM64.

Bug: v8:9909
Change-Id: Id41bb3c02c1873e1380463264a3e5fd31949c949
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2103107
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66733}