Add non k8s single stat metrics dashboard template

What does this MR do?

This adds an single stat panel type metrics dashboard template, this doesn't use k8s based labels for the query

&4077

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content