fix(ci): add new workflow which checks if needs-triage is not present

[maxcao13]

Welcome to Cryostat! 👋

Before contributing, make sure you have:

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

---

Fixes: #696

Description of the change:

Puts label check in separate workflow.

Motivation for the change:

GitHub CI notice changes in labels until seemingly being notified from the labeled event.

How to manually test:

maxcao13#5

Notes:

This will result in the CI tests to still run if the label is present or not.