refactor: Optimize Prometheus queries formatting in block production dashboard

[crStiv]

This PR improves the readability and efficiency of the Lodestar block production dashboard by:

• Optimizing Prometheus query formatting by removing unnecessary line breaks between operators
• Standardizing tooltip modes across panels for better UX consistency
• Adding missing pluginVersion fields for better version control
• Improving query readability by using consistent formatting patterns

These changes make the dashboard configuration more maintainable and slightly more efficient without affecting the actual functionality.

Technical changes:

• Removed \n characters between rate() operators
• Standardized tooltip mode to "multi" where applicable
• Added missing pluginVersion fields
• Optimized query formatting for better readability

No functional changes were made to the metrics or visualization logic.

[CLAassistant]

All committers have signed the CLA.

[nflaig]

the line breaks are added to improve readability when editing the panels in grafana