Rename array grouping methods according to the consensus on TC39 June
meeting.

Bug: v8:12499
Change-Id: I89cb3a49b0de45b74131877bb70d38b49233f275
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3692436
Commit-Queue: Chengzhong Wu <legendecas@gmail.com>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81009}