Add vtkDataSetImplicitBackendInterface for implicit arrays using a vtkDataSet internally

Using vtkImplicitArray allows for memory reduction, at cost of computing the "answer" each time a value is requested. In some use case, this computation is done by forwarding the request to a vtkDataSet, but then we have a vtkDataArray handling a vtkDataSet.

This adds a helper to properly handle objects lifetime. Use it in vtkCellValidator, vtkCountFaces and vtkCountVertices.

see #19334 (closed)