make drawing dihypergraph and multilayer consistent with other drawing functions

[maximelucas]

draw_dihypergraph and draw_multilayer have not been updated since we updated the drawing of nodes #441 and hyperedges #456 . We should update them for consistency by using collections. We should also remove their dependencies on the "old" functions _scalar_arg_to_dict() and _color_arg_to_dict that have problems #442 #410, to use the newer _parse_color_arg , _draw_arg_to_arr, _interp_draw_arg. This is the last place the "old" ones are used.

For draw_dihypergraph, we could try to use more existing functions. The drawing of the "edge nodes" could be done via the draw_nodes function.

[maximelucas]

Fixed by #476 for draw_dihypergraph. draw_multilayer remains.