When converting to NumPy, throw TypeError when type is not supported (#21608)
Summary:
This makes the error thrown in aten_to_numpy_dtype consistent with that in numpy_dtype_to_aten.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21608
Differential Revision: D15816035
Pulled By: gchanan
fbshipit-source-id: 392e8b9ea37003a859e7ed459911a1700fcbd695
