cli: reorganise diagnostics subcommand#5205

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Pothulapati merged 12 commits intomainfrom

tarun/cli-diagnostics

Feb 25, 2021

Commits on Nov 10, 2020

Commits on Nov 12, 2020

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Commits on Feb 24, 2021

add cp-metrics as a alias for `controller-metrics`
Pothulapati
committed

Commits on Feb 25, 2021

update cmd suggestions to reflect the new changes
Pothulapati
committed