[KubeRay][docs] Warning about kubectl apply, update feature state wording. (#25685)
[KubeRay][docs] Warning about kubectl apply, update feature state wording. (#25685)

This PR

Adds a warning about a known issue to the KubeRay section of the Ray docs.
Updates the description of the feature state of KubeRay integration.
Adds some links to the KubeRay docs.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray