[core][docs] Update misleading Ray job diagram

[edoakes]

Before:

After:

[gemini-code-assist]

Code Review

This pull request updates the Ray job submission diagram to be more accurate, reflecting two primary ways to run a job instead of three. The change involves replacing the old SVG diagram with a new PNG version and updating the corresponding markdown file. The change is clear and achieves its goal. I've added one suggestion to consider using SVG format for the new diagram for better scalability and quality.

[Yicheng-Lu-llll]

I noticed that in the doc https://docs.ray.io/en/latest/cluster/running-applications/job-submission/index.html, the "Running Jobs Interactively" section still includes Ray Client. However, when using Ray Client, the Python driver runs on the local machine, which may be worth clarifying in the docs.

[edoakes]

I noticed that in the doc https://docs.ray.io/en/latest/cluster/running-applications/job-submission/index.html, the "Running Jobs Interactively" section still includes Ray Client. However, when using Ray Client, the Python driver runs on the local machine, which may be worth clarifying in the docs.

Good call out, but in general we want to de-emphasize using Ray Client. It's listed as "experts only" in that docs page, so I'd prefer to leave it out of the diagram.

[edoakes]

Manually checked the rendering of the image, looks good