[Grafana] Support long term trend analysis

[zoetrope]

What

If you run the following query with a period of 6 months, it may time out.

max (node_cpu_frequency_max_hertz) by (address)

How

Extending Grafana's timeout may help us. https://grafana.com/docs/grafana/latest/administration/configuration/

Checklist

• [ ] Finish implementation of the issue
• [ ] Test all functions
• [ ] Have enough logs to trace activities
• [ ] Notify developers of necessary actions