Users who want to upload multiple cherry picks usually run "git
cherry-pick" locally, multiple times. Gerrit does not recognize
these changes as cherry picks and neither do other services that
query cherry pick info from Gerrit, e.g. rubber stamper.
For Gerrit to identify a change as a true cherry pick, you need to
use their Cherry Pick Revision REST API endpoint. This new command
uses it to create a chain of cherry pick CLs recognized by Gerrit.
Bug: b/341792235
Change-Id: I4ba75da3901f6ea68c1debd65820e802da681798
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5756161
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Commit-Queue: Gavin Mak <gavinmak@google.com>