Resolve "Add graph value to hover"

What does this MR do?

Adds graph values to the cursor "flag" within the monitoring page graphs.

Screenshots (if relevant)

Deployment Flag:

Non-Deployment Flag:

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered

What are the relevant issue numbers?

Closes #38030 (closed)