The check relies on cl.GetRemoteBranch() and cl.GetRemoteUrl() that
both rely on git. Provide that info with Gerrit info from input_api
if available instead of always calling git.
Bug: 333744051
Change-Id: I915d6451d808c9bf871804d116ea884294ee7c84
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5479889
Commit-Queue: Gavin Mak <gavinmak@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Riley Wong <rgw@google.com>