Accept NumPy types in cuda.cooperative

[brycelelbach]

Some cuda.cooperative interfaces only accept Numba types, not NumPy dtypes (e.g. only numba.int32 works, not numpy.int32). This is quite annoying, as many of the host-side APIs we use to create and manage arrays only accept NumPy dtypes, not Numba types.

Everywhere that we accept a type, NumPy types should be supported.

[leofang]

FWIW, NumPy data types (ex: np.int32, which is a valid Python type) and dtypes (ex: np.dtype(np.int32)) should be both accepted.