[RayCluster] Introduce how to run ray remote job with ray client

[0yukali0]

Description

Expected results

In target doc, appending a method 3 note aray client link and an example in the doc.

method 1:
method 2:
ray client(method 3):
ray client link
python -c "import ray; ray.init("ray://<raycluster head>:10001"); print(ray.cluster_resources())"

software version

ray: 2.9.0
python:3.8.18
kuberay: 1.1.1
kind: 1.26.0

Env i demo

#local python env
conda create env -n demo python=3.8.18
conda activate demo
pip install "ray[all]"==2.9.0

### Link

_No response_

[kevin85421]

Currently, Ray client is not actively maintained. That's why we don't put Ray client on the KubeRay doc. We have some plans of Ray Client V2 in the future. We can put it on the doc when it is stable enough.