[enterprise-4.18] CNV-67472: Clean up docs structure before adding new content

[abrennan89]

Manual cherrypick of fa95684 xref: #98372

Note: some modifications required due to content removed in 4.20

[openshift-ci-robot]

@abrennan89: This pull request references CNV-67472 which is a valid jira issue.

In response to this:

Manual cherrypick of fa95684 xref: #98372

Note: some modifications required due to content removed in 4.20

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[ocpdocs-previewbot]

🤖 Thu Sep 04 17:44:43 - Prow CI generated the docs preview:

https://98548--ocpdocs-pr.netlify.app/
https://98548--ocpdocs-pr.netlify.app/openshift-enterprise/latest/virt/monitoring/virt-running-cluster-checkups.html

[openshift-ci]

@abrennan89: all tests passed!

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