Refactor Runners instruction modal data structures

What does this MR do and why?

This change refactors the runners instruction modal data structures, it simplifies the code.

Screenshots or screen recordings

This is the related component, no behavior changes are expected.

How to set up and validate locally

1. Go to any project
2. Open CI/CD settings for the project
3. Expand Runners section
4. Click on "Show runner registration information"
5. Select different Environments (Windows or MacOS)
6. Hover over "Download latest binary" button
7. Confirm the URL is the right one for each binary.

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.