Add more size hints for dynamic arrays

@dgobbi These are the ones you requested

This code highlights the problem with virtual/abstract methods in the public API. It was not clear whether only the abstract methods should be annotated or the overridden methods in the first descendant class or even all the descendant classes for vtkUnstructuredGridBase. So I annotated them all. It also required repeated changes (pointers types to arrays) for the argument declarations which, if the public methods were concrete and the virtual methods protected, would only be necessary in the base class.