satlab: start tagging passport container with cloud builds

BUG=b:578394343
TEST=none

Change-Id: I003d3d78d838aedffc168702ea5ae5b59f1911b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/satlab/+/8671460
Tested-by: Przemysław Filipek <filipek@google.com>
Reviewed-by: Rafał Gaweł <rafalgawel@google.com>
Commit-Queue: Przemysław Filipek <filipek@google.com>