Revert disabling mypy call-overload

[mgovers]

Revert #863 after the patches to the typing regression in NumPy 2.2.0 are fixed.

After investigating, seems to be a NumPy typing regression and not a problem on our end. Basically, there are a lot of typing regressions in numpy 2.2.0.

We will probably want to track this overview issue: numpy/numpy#28076
Note that mypy is also taking action in python/mypy#18343

Minimal repro case for our use case below. When that passes, we should be able to revert this PR.

import numpy as np

# our use case
STRUCTURED_ARR = np.array([(1, 2), (3, 4)], dtype=np.dtype([('a', int), ('b', int)]))
STRUCTURED_ARR['a'] = 10  # mypy error

# even smaller taken from https://github.com/numpy/numpy/issues/28076
ARR = np.arange(2)
ARR = x + 1  # mypy error

Originally posted by @mgovers in #863 (comment)