[occm] Fix serviceMonitor labelSelector and remove deprecated bearerT…

[claudia-lola]

…okenFile auth

What this PR does / why we need it:
The labels on the Service did not match the ServiceMonitor selector. Prometheus was unable to discover the target. This change sets the labels so the ServiceMonitor selects the correct Service.
bearerTokenFile is deprecated and no longer works. ServiceMonitor was updated to use a supported authentication method.
authorization-always-allow-paths="/metrics" was added to ensure metrics can be scraped.

Which issue this PR fixes(if applicable):
fixes #

Special notes for reviewers:

Release note:

NONE

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