create dashboard for openmetrics v2

[Janaeq]

What does this PR do?

Create a CoreDNS dashboard for openmetrics V2 metrics

Motivation

https://datadoghq.atlassian.net/browse/AGENT-12365

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Changelog entries must be created for modifications to shipped code
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[Janaeq]

/merge

[dd-devflow]

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[github-actions]

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[dd-devflow]

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[Janaeq]

/merge

[dd-devflow]

🚂 MergeQueue: waiting for PR to be ready

This merge request is not mergeable yet, because of pending checks/missing approvals. It will be added to the queue as soon as checks pass and/or get approvals.
Note: if you pushed new commits since the last approval, you may need additional approval.
You can remove it from the waiting list with /remove command.

Use /merge -c to cancel this operation!

[dd-devflow]

⚠️ MergeQueue: This merge request was unqueued

This merge request was unqueued

If you need support, contact us on Slack #devflow!

The requested code changes are addressed. Dismissing to unblock merge.