Add docs for Deploying with helm charts

[swuferhong]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

We will support deploy fluss using helm charts in #1685 . This issue is aims to add docs for Deploying with helm charts.

Solution

No response

Anything else?

No response

Willingness to contribute

• I'm willing to submit a PR!

[dreger1997]

I will add this and take over the issue, please assign it to me