skip the pandas datetime roundtrip test with pandas=3.0 (#9104)

* skip the roundtrip test with `pandas=3.0`

* mention the relevant issue in the skip reason

properties/test_pandas_roundtrip.py

@@ -9,6 +9,7 @@
 import pytest
 
 import xarray as xr
+from xarray.tests import has_pandas_3
 
 pytest.importorskip("hypothesis")
 import hypothesis.extra.numpy as npst  # isort:skip
@@ -110,6 +111,10 @@ def test_roundtrip_pandas_dataframe(df) -> None:
     xr.testing.assert_identical(arr, roundtripped.to_xarray())
 
 
+@pytest.mark.skipif(
+    has_pandas_3,
+    reason="fails to roundtrip on pandas 3 (see https://github.com/pydata/xarray/issues/9098)",
+)
 @given(df=dataframe_strategy)
 def test_roundtrip_pandas_dataframe_datetime(df) -> None:
     # Need to name the indexes, otherwise Xarray names them 'dim_0', 'dim_1'.