not have rocketmq_ group_ get_ latency

[navyaijm2017]

Describe the bug The new version does not have rocketmq group get latency，I'd like to know if my consumer group has any delay and should look at that indicator，rocketmq group get latency by storetime is not the consumption delay of the client

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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
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• Version [e.g. 22]

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[francisoliverlee]

@navyaijm2017 working on this, wait a moment

[navyaijm2017]

@navyaijm2017 working on this, wait a moment

thx，waiting

[francisoliverlee]

this is consumer diff metrics, can it meet your demands?