0024708: Convertation of the generic classes to the non-generic. Part 2

0024708: Convertation of the generic classes to the non-generic. Part 2

Generic classes from "AppParCurves" package:
    "AppDef_SmoothCriterion", "AppDef_LinearCriteria" and "AppDef_Variational" moved to the corresponding non-generic classes "AppDef_SmoothCriterion", "AppDef_LinearCriteria" and "AppDef_Variational" to "AppDef" package. Also several "*.cxx" files of "AppDef_Variational" class merged to one ".cxx".
Generic class from "IntImp" package:
    "IntImp_ZerCOnSSParFunc" moved to the corresponding non-generic class "IntPatch_CSFunction" to "IntPatch" package.
Next unused generic classes were removed:

- IntCurveSurface_SurfaceTool
- Intf_InterferencePolygon3d
And some other minor changes.