[CI] Skip test_multi_node_3 on Windows (#13723)
[CI] Skip test_multi_node_3 on Windows (#13723)

test_multi_node_3 was recently split from test_multi_node, but we forgot
to skip it on Windows
ray-project/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,ray-project/ray