[Tab Switcher] Revive most of the TabGridIphTest suite

This suite was all disabled. As of the fix CL last week, test-reviver
reports all but two tests are now passing (although one was missing a
golden).

https://ci.chromium.org/ui/p/chromium/test-search?q=TabGridIphTest

Fixed: 341267765
Change-Id: I1fdc323caf4918d7a0b4475d38d7561352345068
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5554981
Reviewed-by: Sky Malice <skym@chromium.org>
Commit-Queue: Sky Malice <skym@chromium.org>
Auto-Submit: Calder Kitagawa <ckitagawa@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1303903}