[Tech Request]: 增加gc的metric，用来做告警

[volgariver6]

Is there an existing issue for the same tech request?

• [x] I have checked the existing issues.

Does this tech request not affect user experience?

• [x] This tech request doesn't affect user experience.

What would you like to be added ?

目前内核中没有针对gc的metric，需要加一个gc的数据采集，类似checkpoint的数据采集
然后把长时间未做gc加入到告警中

Why is this needed ?

No response

Additional information

No response