BUG: comparison of np.void with memoryview hits unreachable error

Describe the issue:

When comparing np.void against a memoryview results in "TypeError: Cannot compare structured with unstructured void arrays. (unreachable error, please report to NumPy devs.)".

Reproduce the code example:

import numpy as np
memoryview(np.void(4)) == np.void(4)  # this works
np.void(4) == memoryview(np.void(4))  # this excepts

Error message:

>>> np.void(4) == memoryview(np.void(4))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Cannot compare structured with unstructured void arrays. (unreachable error, please report to NumPy devs.)

Runtime information:

import sys, numpy; print(numpy.version); print(sys.version)
1.24.2
3.10.7 (tags/v3.10.7-dirty:6cc6b13308, Sep 12 2022, 08:30:52) [GCC 9.4.0]

print(numpy.show_runtime())
WARNING: threadpoolctl not found in system! Install it by pip install threadpoolctl. Once installed, try np.show_runtime again for more detailed build information
[{'simd_extensions': {'baseline': ['SSE', 'SSE2', 'SSE3'],
'found': ['SSSE3',
'SSE41',
'POPCNT',
'SSE42',
'AVX',
'AVX2'],
'not_found': ['F16C',
'FMA3',
'AVX512F',
'AVX512CD',
'AVX512_KNL',
'AVX512_KNM',
'AVX512_SKX',
'AVX512_CLX',
'AVX512_CNL',
'AVX512_ICL']}}]
None

Context for the issue:

Not a priority, just doing my duty and reporting to NumPy devs as requested in the error message.

Start by running the provided np.void and memoryview comparison examples on the current NumPy version, then trace the comparison path responsible for the unreachable TypeError. No source file or test is named in the issue; done means the reversed comparison no longer raises that error and a regression test covers both comparison directions.