Use "git cl try -B <bucket>" instead.

R=smut

Bug: 570733
Change-Id: Id5fedadede9fd8305e4567028ce4a4326d775cf5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1779545
Commit-Queue: Andrii Shyshkalov <tandrii@google.com>
Reviewed-by: smut <smut@google.com>