WIP: vtkType: Prefer `long` over `long long` for 64-bit integers when possible

For each vtkTypeInt# and vtkTypeUInt# we select the "smallest" fundamental integer type that matches the desired size. Fix the logic for 64-bit integer types to do this too for consistency with the other types. We already do this in Utilities/KWIML/vtkkwiml/include/kwiml/int.h.