make DriverVectorCube.from_geodataframe compatible with pandas 3

[soxofaan]

Issue #459

[soxofaan]

jenkins run in python 3.11 env (with pandas3) just finished.

original problem ("Cannot interpret '<StringDtype(na_value=nan)>' as a data type") is gone, but one remaining problem:

>   ???
E   KeyError: 'A'

pandas/_libs/tslibs/offsets.pyx:6213: KeyError

During handling of the above exception, another exception occurred:

>   ???

pandas/_libs/tslibs/offsets.pyx:6344: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pandas/_libs/tslibs/offsets.pyx:6219: in pandas._libs.tslibs.offsets._get_offset
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   ValueError: Invalid frequency: A-DEC. Failed to parse with error message: KeyError('A'). Did you mean Y-DEC?

pandas/_libs/tslibs/offsets.pyx:6137: ValueError

During handling of the above exception, another exception occurred:

    def test_period_to_intervals_yearly():
>       intervals = _period_to_intervals("2018-06-08", "2021-08-24", "year")
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/test_ProcessGraphDeserializer.py:68: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
openeo_driver/ProcessGraphDeserializer.py:1462: in _period_to_intervals
    start_dates = pd.date_range(
venv311/lib/python3.11/site-packages/pandas/core/indexes/datetimes.py:1442: in date_range
    freq = to_offset(freq)
           ^^^^^^^^^^^^^^^
pandas/_libs/tslibs/offsets.pyx:6229: in pandas._libs.tslibs.offsets.to_offset
    ???
pandas/_libs/tslibs/offsets.pyx:6352: in pandas._libs.tslibs.offsets.to_offset
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   ValueError: Invalid frequency: A-DEC. Failed to parse with error message: ValueError("Invalid frequency: A-DEC. Failed to parse with error message: KeyError('A'). Did you mean Y-DEC?") Did you mean Y-DEC?

pandas/_libs/tslibs/offsets.pyx:6137: ValueError