[minor] Add manage onlineUpgrade cronjob

[whitfiea]

https://jsw.ibm.com/browse/MASCORE-4544

Adds a new cronjob that can be set to a schedule (defaults to midnight every night), that will run and check if there is an offline update pending for Manage. This is only used when the manage ws spec has settings.db.upgrade.upgradeType set to onlineUpgrade.

If there is no pending update then the job exits doing nothing. If there is one pending then it patches the ManageOfflineUpgradeRequest resource with the stage requested. this will then cause the Manage workspace operator to bring down the serverbundles and update them. It will also remove the status from the ManageOfflineUpgradeRequest as this was causing problems with the manage operator when it was trying to detect what needs to happen. If the status is not present then it doesn't try to remove it.

See also PR ibm-mas/cli#1391

Tested with the default schedule and a provided schedule, and the cronjob is created/recreated in both cases:

When the job does run this is the output:

Also tested:

• regularUpgrade set - no cronjob created
• onlineuprgrate cronjob called when status exists and pending update - status removed and update triggered
• onlineuprgrate cronjob called when status exists and no pending update - no-op
• onlineuprgrate cronjob called when no status exists and pending update - update triggered