Rest of Dispatcher Refactor (EE)

What does this MR do?

EE port of rest-of-dispatcher

Are there points in the code the reviewer needs to double check?

No

Why was this MR needed?

#41341

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug
• Review
  • Has been reviewed by Frontend
• Conform by the merge request performance guides
• Conform by the style guides
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

#41341