add timing toggle in datafusion cli to allow timing info printing to be turned on or off

[jimexist]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

add timing toggle in datafusion cli to allow timing info printing to be turned on or off

Describe the solution you'd like

Add a new flag called timing and by default turned on, unless file a supplied in which case by default is off.

Either case users can override with the timing flag.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.