Deprecate `VirtualObjectHandle` and all other classes that are used to
implement objects with virtual methods in the execution environment.
Additionally, the code is updated so that if the
`VTKm_NO_DEPRECATED_VIRTUAL` flag is set none of the code is compiled at
all. This opens us up to opportunities that do not work with virtual
methods such as backends that do not support virtual methods and dynamic
libraries for CUDA.
CellInterpolationHelper.h(43): warning #2913-D: __device__ annotation is
ignored on a function("~CellInterpolationHelper") that is explicitly
defaulted on its first declaration.
