`tropo_pyaps3.get_snwe()`: return native `int` instead of `numpy.int64` (#1324)

+ In the `get_snwe` function within `tropo_pyaps3.py`, the original `return (S, N, W, E)` was returning S, N, W, and E as NumPy's `np.int64` type, while the expected type was standard Python's int. Therefore, I modified the return statement to `return (int(S), int(N), int(W), int(E))`, which successfully fixed the problem.

+ Remove unnecessary formatting

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Co-authored-by: Zhang Yunjun <yunjunz@outlook.com>