VTK Chart Overlay Doesn't work with VTK 9

Finally found the problem: I need to do the vtk_module_autoinit directly on the library using the chart overlay.

Previously, we had only done the vtk_module_autoinit on our core library (a .dll /.so) which was used from all our other libraries and which exports VTK libraries by using PUBLIC in the target_link_library call with VTK libraries…