MON-4029: Add KubeStateMetrics api

[marioferh]

after: https://github.com/openshift/api/pull/2322

[openshift-ci[bot]]

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[marioferh]

/retest-required

[marioferh]

Actual API for KSM changes seem straightforward and look fine to me.

I noticed there are no integration tests in place. Can we add some simple ones to make sure things like .spec.kubeStateMetricsConfig: {} isn't valid and help us catch any potential regressions from changes in the future?

done

[everettraven]

/assign

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@marioferh: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-serial-techpreview-2of2	1b8a12370c1fdec15bd415a65403855ba4037cd7	link	true	/test e2e-aws-serial-techpreview-2of2
ci/prow/minor-e2e-upgrade-minor	cc552d8deb671db06cf6f5f9a541a279935f77e6	link	true	/test minor-e2e-upgrade-minor

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[openshift-ci-robot]

@marioferh: This pull request references MON-4029 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 sub-task to target the "4.21.0" version, but no target version was set.

In response to this:

after: https://github.com/openshift/api/pull/2322

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/lifecycle stale

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[openshift-merge-robot]

PR needs rebase.

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Stale issues rot after 30d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle rotten. Rotten issues close after an additional 30d of inactivity. Exclude this issue from closing by commenting /lifecycle frozen.

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/lifecycle rotten /remove-lifecycle stale