API: Add cross to numpy.linalg [Array API]

[mtsokol]

This PR contains next Array API compatibility change. It adds numpy.linalg.cross (almost the same as numpy.cross) with docs taken from Array API specification.

[ngoldbaum]

This looks good to me. xref #13718 for a little context.

It also looks like we've already deprecated the 2D cross product behavior:

In [2]: np.cross([1, 2], [2, 1])
<ipython-input-2-eec728c54e9b>:1: DeprecationWarning: Arrays of 2-dimensional vectors are deprecated. Use arrays of 3-dimensional vectors instead. (deprecated in NumPy 2.0)
  np.cross([1, 2], [2, 1])
Out[2]: array(-3)

In it goes. Thanks @mtsokol!