[NCM] Add public docs for rollbacks

[zoedt]

What does this PR do? What is the motivation?

• we are adding public docs for releasing ncm rollbacks
• doc for setting up based from here
• rfc for rollbacks in general here + subsets of more documents underneath that main one

Merge readiness

• create first draft
• fill in TODOs
• screenshots
• approvals / address feedback
• Ready for merge

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Additional notes

[github-actions]

Preview links (active after the build_preview check completes)

New or renamed files

• https://docs-staging.datadoghq.com/zoe/ncm-rollbacks/network_monitoring/devices/config_management_rollback

Modified Files

• https://docs-staging.datadoghq.com/zoe/ncm-rollbacks/network_monitoring/devices/config_management

[zoedt]

/review

[dplepage-dd]

IIRC when you enable the private action runner in your datadog.yaml you also need to provide a list of allowed actions, which has to explicitly contain com.datadoghq.remoteaction.networkconfigmanagement.rollbackConfig.

[zoedt]

double checked their public docs and amended list item 2, lemme know if that sounds more accurate? ty for the pointer!!

[github-actions]

🤖 Automated review by Claude. AI-generated; verify before acting.

Thanks for the new rollback docs. Blocking items before merge:

• Two image alt attributes still say TODO: describe what this screenshot shows — please add real alt text for accessibility.
• The image path exeuction_group_policy.png looks like a typo for execution_group_policy.png; please double-check the uploaded asset name.
• Aruba (EOS) in the supported vendors list appears incorrect — the profile table in config_management.md lists EOS under Arista, and Aruba under AOS-CX / AOS-W.
• The new page isn't wired into config/_default/menus/main.en.yaml, so it won't appear in the left nav under NDM > Configuration Management. Please add a menu entry (or confirm this page is intentionally discoverable only via cross-links).

A couple of smaller style nits inline as well.

_{Reviewed 5c21b19322ced31e9f1632c6c35b4fd8a9ff7199 — workflow run}

[github-actions]

Suggestion: This new page doesn't appear in config/_default/menus/main.en.yaml. Users landing on the parent NCM page can follow the cross-link, but the rollback page won't be reachable from the left-nav. Consider adding an entry under ndm_config_management so it's discoverable in the side-nav.

[joepeeples]

Hi @zoedt, I added the Work In Progress label to this PR since it's still incomplete (needs screenshots, add page to the navigation menu, etc.). When the PR is fully complete and ready for review, you can remove the label and someone from the Docs team will review it then. Thanks!

[datadog-datadog-prod-us1-2]

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[joepeeples]

Opened DOCS-15135 to assign a Docs writer and follow up with editorial review.