[Improve][K8S] update the k8s document about cluster mode

[liunaijie]

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• [X] I had searched in the feature and found no similar feature requirement.

Description

Now the document about k8s only has local mode, will add some document about cluster mode setup in k8s

Usage Scenario

No response

Related issues

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Are you willing to submit a PR?

• [X] Yes I am willing to submit a PR!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity for 30 days. It will be closed in next 7 days if no further activity occurs.

[liunaijie]

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