Metrics graph error fix

What does this MR do?

Shows up empty/loading error states for certain scenarios when there's not even enough data to plot a single point on the graph. This is done via rejecting a promise

Why was this MR needed?

To fix an ongoing bug for the prometheus monitoring

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

closes #30840 (closed)