chore(geopandas): Replace `assert_series_equal` calls with `pd.check_pd_series_equal()`

[petern48]

While reviewing #2378, I noticed there are some sprinkles of assert_series_equal() calls in the test files from earlier development. We should instead use the self.check_pd_series_equal() wrapper because it validates that the result of our Geopandas functions is ps.Series (pyspark series) and not pd.Series (pandas series).

Usually, the to_pandas() call is inlined, but sometimes it occurs on another line like below. We should update these cases, too.

sedona/python/tests/geopandas/test_geoseries.py

Lines 672 to 674 in 56f1969

	result = geoseries.length.to_pandas()
	expected = pd.Series([0.000000, 1.414214, 3.414214, 4.828427])
	assert_series_equal(result, expected)

Definition of Done:
Running the following grep command should ideally only return the call in the check_pd_series_equal function (and the import). There's definitely a lot more than that at the moment. If we can't replace every call, then it's a bad sign that maybe we're returning a non-scalable pd.Series instead of the spark version.

grep -r "assert_series_equal" sedona/python/tests/geopandas