Fix auto-restarting of MM2 connectors

[scholzj]

Type of change

• Bugfix

Description

This PR fixes the auto-restarting feature for MM2 connectors. It seems that this feature never worked, because:

• The auto-restart configuration was never passed to the ConnectorSpec passed to the connector operator
• The connector operator was reading the wrong auto-restart status from MM2 but always from the KafkaConnector resource. So if the previous step ever worked, it would end up in an endless loop of very rapid restarts.

This PR fixes these issues and adds a unit test for it.

This should fix #9965.

Checklist

• Write tests
• Make sure all tests pass
• Try your changes from Pod inside your Kubernetes and OpenShift cluster, not just locally
• Reference relevant issue(s) and close them after merging

[scholzj]

/azp run regression

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ppatierno]

LGTM.

[katheris]

Couple of nits around javadoc and comments but otherwise looks good to me