Update Couchbase Support for Hibernate

[ingenthr]

Is this a BUG REPORT or FEATURE REQUEST?:
Feature update

Stork currently has support for Couchbase and with a recent update to the Couchbase Operator in version 2.1, we added a hibernate {true|false} field along with an associated event that should make it easier for Stork to completely stop a CouchbaseCluster, so it can be un-hibernated at a later date (possibly replicated to another location by Stork).

Per discussion with @disrani-px and some others a few months back, it'd be great to update Stork to use this hibernate and the associated event.

See the hibernation details in the docs, including the specific part of our custom resource to modify.