add velero grafana dashboard and kube-state-metrics config

[tony-schndr]

https://redhat.atlassian.net/browse/ARO-22881

What

Adds kube-state-metrics to track velero CRDs and dashboards

Why

Testing

Uploaded to grafana and validated dashboards

Special notes for your reviewer

PR Checklist

• PR is scoped to a single task (no mixed concerns)
• Title follows Conventional Commits format
• Summary explains the "Why" behind the change
• Linked to relevant ticket/issue
• Screenshots included (if graph/UI/metrics changes)
• Self-reviewed the diff
• CI/CD checks are passing (ignore Tide)
• Draft PR used for WIP (if applicable)
• Commit history is clean (rebased/squashed)
• Tricky code blocks are commented
• Specific reviewers tagged
• All comment threads resolved before merge

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: tony-schndr
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