test(scorecard): scorecard test to verify Grafana data

[tthvo]

Welcome to Cryostat! 👋

Before contributing, make sure you have:

• [x] Read the contributing guidelines
• [x] Linked a relevant issue which this PR resolves
• [x] Linked any other relevant issues, PR's, or documentation, if any
• [x] Resolved all conflicts, if any
• [x] Rebased your branch PR on top of the latest upstream main branch
• [x] Attached at least one of the following labels to the PR: [chore, ci, docs, feat, fix, test]
• [x] Signed all commits: git commit -S -m "YOUR_COMMIT_MESSAGE"

---

Fixes: #793 Depends on https://github.com/cryostatio/cryostat-grafana-dashboard/pull/68

Description of the change:

WIP

Motivation for the change:

See #793

How to manually test:

WIP