Add dask-expr for windows envs (#8837)

* Add dask-expr for windows envs

* Add xfail

* xfail

Author: dcherian

ci/requirements/environment-windows-3.12.yml

@@ -8,6 +8,7 @@ dependencies:
   - cartopy
   - cftime
   - dask-core
+  - dask-expr
   - distributed
   - flox
   - fsspec

ci/requirements/environment-windows.yml

@@ -8,6 +8,7 @@ dependencies:
   - cartopy
   - cftime
   - dask-core
+  - dask-expr
   - distributed
   - flox
   - fsspec

xarray/tests/test_dataarray.py

@@ -3420,6 +3420,7 @@ def test_to_dataframe_0length(self) -> None:
 
     @requires_dask_expr
     @requires_dask
+    @pytest.mark.xfail(reason="dask-expr is broken")
     def test_to_dask_dataframe(self) -> None:
         arr_np = np.arange(3 * 4).reshape(3, 4)
         arr = DataArray(arr_np, [("B", [1, 2, 3]), ("A", list("cdef"))], name="foo")