Remove test support for NumPy < 1.23

[radarhere]

#8326 caught a deprecation warning from NumPy < 1.23, reporting when an exception occurred within __array_interface__ but was not raised.

/Pillow/Tests/test_image_array.py:51: DeprecationWarning: An exception was ignored while fetching the attribute __array_interface__ from an object of type 'JpegImageFile'. With the exception of AttributeError NumPy will always raise this exception in the future. Raise this deprecation warning to see the original exception. (Warning added NumPy 1.21)

Those versions of NumPy are no longer active though, so the warning no longer needs to be caught, leaving just the test for the actual exception.