Reorganize the hiearchy for interactive widget
PENDING until !3546 is merged
MR !3546 introduce the concept of interactive 2d widget within paraview but there's still some issue with the architecture : pqInteractiveProperty2DWidget is mostly a copy paste of the pqInteractivePropertyWidget.
Imo we'd need to make the pqInteractivePropertyWidget an abstract class while keeping all the logic we can inside it, and then introduce a new pqInteractiveProperty3DWidget class for all widget that currently inherit pqInteractivePropertyWidget.
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