[ios] Add confirmation for ungroping and deleting from tab strips

This CL
- adds the confirmation for ungrouping/deleting a group from tab
strips when the tab group sync feature is enabled.
- moves TabGroupConfirmationCoordinator to the parent directory.
- separates TabGroupActionType from tab_groups_commands.h since
it's used from tab_strip/ not only from tab_grid.

screen record: https://drive.google.com/file/d/1_0bY-SFnIICJpuTbV5lf6Qkd3KTVvaA3/view?usp=sharing

Bug: 329631145, 329628615
Change-Id: I303ded65f5770a2ed877b07e25df33f4430efa02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5729752
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Asami Doi <asamidoi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1332880}