🚀 Feature/stateful publics

• Provide simple option to deploy more than one public instance.
• Load balancing between publics via ingress.
• Auto-registration on startup of public instances.
• Fix re-deployment error because manually created pvc for author home is immutable (but isn't actually being changed 😕 ).
• Content sync if needed from other (functioning) publics if ordinal > 0.
• Implement magnolia-backup coordination on fresh public startup.
• Implement activation lock/unlock coordination (done in project magnolia-bootstrap)