[occm] Update ServiceMonitor to use common labels

[GitBluub]

What this PR does / why we need it:
service monitor doesn't have the controller manager labels, use the service's labels as the selector for servicemonitor

Which issue this PR fixes(if applicable):
none
Special notes for reviewers:

Set serviceMonitor.enabled: true in the helm chart

Release note:

fixed label selector in occm service monitor

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @GitBluub. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[k8s-ci-robot]

PR needs rebase.

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