VTK 9 changes the CMake interface pretty significantly. To get ACVD working with VTK 7, 8, and 9, we need to address at least the following: - No more `VTK_USE_FILE` (handled in !9) - VTK library targets now have CMake prefixes (e.g. `vtkCommonCore -> VTK::CommonCore`) - Missing includes, symbols, and definitions when the above are fixed. This implies missing includes or linkage somewhere.