Example of using Agent Sandbox + Kata on GKE cluster

[maqiuyujoyce]

Add an example of using Agent Sandbox + Kata on GKE cluster.

[zvonkok]

Hi everyone, Zvonko here from the Kata Community (maintainer and member of the architecture committee). Do we want to embed the deployment here in this repo, or would you prefer a link to our repository as the source of truth for deploying the Agent Sandbox?

[maqiuyujoyce]

Hi @zvonkok , thanks for checking! My goal of this issue is to have something working that users can follow to install Kata on GKE cluster and then using Agent Sandbox to manage the Kata Runtime resource(s). So I'll add a link to Kata repo as a reference. Will cc you in the PR!