[Master] Delaying goroutine creation of Statistic

[wenfengwang]

FEATURE REQUEST

1. Please describe the feature you are requesting.
   Delaying goroutine creation of Statistic

2. Provide any additional detail on your proposed use case for this feature.
   in the current version, the statistics.newStatsItemSet() will call init() method to create all scheduled tasks, total will create 30 goroutines. for one project that just imports the go SDK, but not create a consumer instance immediately, it is a heavy cost

3. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?

should-have

4. If there are some sub-tasks using -[] for each subtask and create a corresponding issue to map to the sub task:
   none