[Orca Draft] Tutorial for Submit and Run Programs on K8s

[sgwhat]

Description

This PR will release a tutorial for running Orca PyTorch Pyspark program on K8s cluster, it provides a detailed step-by-step guide and a simple FashionMNIST example that allows users to follow easily.

1. Why the change?

Running programs on k8s could be complicated sometimes, and users may not be clear on how to run programs correctly, which leads to many errors and brings bad user experience.

2. User API changes

N/A

3. Summary of the change

Add a detailed step-by-step tutorial. Add a simple example.

4. How to test?

• [x] Example test
• [ ] Document test

[hkvision]

More discussions here: https://github.com/intel-analytics/arda-docker/issues/682 Need to confirm the discussions before merging this PR.