Language wrapper deprecation forwarding
Python wrapping should apply @deprecated
attributes to classes, methods, members, enum variants, macros, and so on which are deprecated in C++. For this, the wrappers should probably see VTK_DEPRECATED_IN_X_Y_Z(reason)
as [[vtk::deprecated(X.Y.Z, reason)]]
for turning in to the appropriate target language spelling.
Cc: @dgobbi