SDN-3817:Expose OVNKubernetes:AdminNetworkPolicy Metrics via telemetry

[tssurya]

• I added CHANGELOG entry for this change.
• No user facing changes, so no entry in CHANGELOG was needed.

[openshift-ci-robot]

@tssurya: This pull request references SDN-3817 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.16.0" version, but no target version was set.

In response to this:

• I added CHANGELOG entry for this change.
• No user facing changes, so no entry in CHANGELOG was needed.

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[tssurya]

/hold

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: tssurya
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[openshift-merge-robot]

PR needs rebase.

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