Change the RestartPolicy of the operator cleanup pod to Never

[huchengze]

Describe the problem/challenge you have
The RestartPolicy of the operator cleanup pod is OnFailure now, and if cleanup failed for 6 times(default backoffLimit), The cleanup job will be retained but the corresponding pod will be deleted, resulting in the loss of the failure log.

Describe the solution you'd like
Change the RestartPolicy of the operator cleanup pod to Never, so that cleanup pod and failure log will be retained.

Anything else you would like to add:
https://kubernetes.io/docs/concepts/workloads/controllers/job/#pod-backoff-failure-policy