Update devops illustration

What does this MR do and why?

• Replace project-run-CICD-pipelines-sm illustration with empty-devops-md
• Migrate EmptyState

Unused illustrations will be deleted in this MR -> gitlab-svgs!991 (merged)

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Go to /flightjs/Flight/-/ci/editor
2. Click Configure pipeline if you see empty state
3. Open Validate (beta) tab
4. See empty state

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

#430244 (closed)