[Test][Client] make sure Ray cluster shuts down after test terminates (#22128)
[Test][Client] make sure Ray cluster shuts down after test terminates (#22128)

Apply the same fix in #21589 to another test fixture for Ray client tests. Let's see if this can reduce flakiness in unit tests.


ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray