Add gardener_rotations property This is a temporary measure to allow SoM to update their code before we can remove the sheriff_rotations property. Bug: chromium:343503161 Change-Id: I461db50f09e6946ceb6244199208935d38a99598 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5580852 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>