Alert type label -> label_added

Rewrite label as label_added here https://git.ligo.org/emfollow/gwcelery/blob/master/gwcelery/tasks/orchestrator.py#L58

List of alert_types here https://gracedb-playground.ligo.org/documentation/lvalert.html#event-alerts

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information