TST: dask: xfail searchorted_scalars test on dask

Dask does not allow scalars as arguments to searchsorted:

$ ARRAY_API_TESTS_MODULE=array_api_compat.dask.array pytest array_api_tests/test_searching_functions.py::test_searchsorted_with_scalars --max-examples 500

...

    @given(data=st.data())
>   def test_searchsorted_with_scalars(data):
                   ^^^
...

        # call np.searchsorted for each pair of blocks in a and v
>       meta = np.searchsorted(a._meta, v._meta)
                                        ^^^^^^^
E       AttributeError: 'int' object has no attribute '_meta'
E
E       ========== FAILING CODE SNIPPET:
E       xp.searchsorted(dask.array<sort, shape=(1,), dtype=uint8, chunksize=(1,), chunktype=numpy.ndarray>, 0, sorter=None, **kw) with kw = {}
E       ====================

Author: ev-br

dask-xfails.txt

@@ -135,6 +135,7 @@ array_api_tests/test_signatures.py::test_func_signature[broadcast_shapes]
 array_api_tests/test_data_type_functions.py::TestBroadcastShapes::test_broadcast_shapes
 array_api_tests/test_data_type_functions.py::TestBroadcastShapes::test_empty
 array_api_tests/test_data_type_functions.py::TestBroadcastShapes::test_error
+array_api_tests/test_searching_functions.py::test_searchsorted_with_scalars
 
 array_api_tests/test_linalg.py::test_eig
 array_api_tests/test_linalg.py::test_eigvals