BUG: Stop item_from_zerodim from converting subclasses of np.ndarray to float

[Julian-Harbeck]

Resolves issue with objects of a subclass of np.ndarray to be converted to float in item_from_zerodim

• closes BUG: item_from_zerodim converts objects of subclasses of ndarray to float #62981
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

Not sure if there should be a test to cover this case. Could be created with a TestArray class as shown in #62981. Also should the docstring of the function be modified to reflect that now only objects of np.ndarray are converted? Current description is a bit ambigues:

If the value is a zerodim array, return the item it contains.

[jbrockmendel]

Not sure if there should be a test to cover this case. Could be created with a TestArray class as shown in #62981. Also should the docstring of the function be modified to reflect that now only objects of np.ndarray are converted? Current description is a bit ambigues:

Not a deal-breaker, but I'd feel better if there were a test