[feature] Support custom refresh intervals for each group of metrics

[zuobiao-zhou]

What's changed?

close #2188

Support custom refresh intervals for each group of metrics. The specific implementation is as follows:

1. Construct a cycle of job refresh interval list based on the refresh intervals of each metric.
2. When the job dispatches, select metrics that are due for refresh to form priorMetrics.

Implementation result:

Checklist

• I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

[tomsun28]

hi sorry for slow response. The idea of ​​implementing is great 👍👍

There is a strange bug here when I test.

I set intervals 30 or 60s when adds port monitoring, the collect interval time work success.

But when i add ubuntu monitoring, config the intervals 60s, the real collect interval time is 2*60s. Seem it is caused by multiple metrics collection and scheduling under ubuntu, and port only has one metric.

[zuobiao-zhou]

Hi @tomsun28, thanks for your feedback. I will investigate the cause and fix this strange bug.