Disable flaky tab drag tests

Bug: 333085989
Change-Id: If692ea7e174c7f2e1fd2bb8020d042e5579120c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5429650


Commit-Queue: Alison Gale <agale@chromium.org>
Reviewed-by: Darryl James <dljames@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283311}