TYP: Replace typing.Optional[T] with T | None in the numpy.typing tests
#26954
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Since Python 3.10
typing.Optional[T]has been deprecated in favour of theT | Nonesyntax.See https://typing.readthedocs.io/en/latest/spec/historical.html#union-and-optional .
Note that the remaining
typing.Optionaluses innumpy._array_api_infoare already dealt with in #26873.