Support for custom precision in dashboard widgets

[prashant-shahi]

Is your feature request related to a problem?

Not really. But it helps to have option to custom precision when dealing with floats.

Describe the solution you'd like

Custom precision option for each queries in number and time series widgets.

Describe alternatives you've considered

NA

/cc @pranay01 @ankitnayan @palashgdev

[ankitnayan]

related issue https://github.com/SigNoz/signoz/issues/1050#issuecomment-1170966900