[KubeRay][Minor][CI] Deflake autoscaling test 
[KubeRay][Minor][CI] Deflake autoscaling test 

Minor adjustment to e2e test logic of KubeRay test.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray