[BUG] cudf.pandas objects are always Callable when wrapped objects are not

[mroeschke]

Describe the bug

In [1]: %load_ext cudf.pandas

In [2]: import pandas as pd

In [3]: ser = pd.Series([1])

In [4]: from collections.abc import Callable

In [5]: isinstance(ser, Callable)
Out[5]: True

In [1]: import pandas as pd

In [2]: ser = pd.Series([1])

In [4]: from collections.abc import Callable

In [5]: isinstance(ser, Callable)
Out[5]: False

Expected behavior
This is a cause of the tests/tpch_q1_test.py::test_q1[dask] and tests/expr_and_series/order_dependent_lazy_test.py::test_dask_order_dependent_ops Narwhals tests failing.

xref #18248

[galipremsagar]

I can take a look at it.