Feature #22733: Pull Jobsub group and global superusers from FERRY
Document changes to jobsub superusers
Somewhere on the jobsub wiki, document that jobsub superusers are stored in FERRY. If an experiment wants to add/remove superusers, they will need to use this form:
Global superusers will have to be added using the API. Don't document this in the jobsub wiki - perhaps the USDC one.