Besides, implement extended add pairwise and i64x2.abs
in liftoff.

Port: aee85229
Port: 8136e399
Port: 31aab838

Bug: v8:11086 v8:11416
Change-Id: I77539c745b67c6b9d4205b4e5e96504e5ad3da13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2717150
Auto-Submit: Liu yu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#72992}