[Bug]: Ensure NumPy-compatibility of test_statistics.py

[mrfh92]

What happened?

In test_statistics.py, NumPy throws the following deprecation warning:

DeprecationWarning: the `interpolation=` argument to percentile was renamed to `method=`, which has additional options.
Users of the modes 'nearest', 'lower', 'higher', or 'midpoint' are encouraged to review the method they used. (Deprecated NumPy 1.22)

Although we only use NumPy here to get the "correct" result to which our Heat result is compared, we should keep this up-to-date.

Code snippet triggering the error

No response

Error message or erroneous outcome

No response

Version

1.3.x

Python version

None

PyTorch version

None

MPI version

No response

[RengarajR404]

Heyy
Can you assign me to this issue?

[github-actions]

Branch bugs/1232-_Bug_Ensure_NumPy-compatibility_of_test_statistics_py created!

[mrfh92]

Further deprecation warning (might depend on NumPy-version used, of course):

test_arithmetics.py:620: DeprecationWarning: `np.math` is a deprecated alias for the standard library `math` module (Deprecated Numpy 1.25). Replace usages of `np.math` with `math`

[mrfh92]

@RengarajR404 feel free to ask if there are any questions :)

[samadpls]

Hey @RengarajR404, if you're not actively working on this issue, can I take it over? Thanks!

[samadpls]

Further deprecation warning related to NumPy 1.25:

factories.py:107: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation.

[mrfh92]

has been addressed in #1315 and #1337