Deprecate prepareOwnerReference in favor of controllerutils

[frederiko]

This small refactor proposes deprecating prepareOwnerReferences in favor of controllerutils.SetControllerReference.

[k8s-ci-robot]

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[ahrtr]

/ok-to-test

[ahrtr]

This is really a nice cleanup.

It's be better to add an e2e test to verify that the statefulSets, headless service and configMap have the correct ownerReference set. It's OK to resolve it in a separate PR. Could you raise an issue to track it? thx

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, frederiko

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