Add job status badges to runners list

What does this MR do and why?

This change adds job status badges to the list of runner managers in the runner details.

Changelog: changed

Screenshots or screen recordings

Before
After

How to set up and validate locally

1. Have a least one runner registered.
2. Visit the admin/runners
3. Select the runner and expand the "Runners" group
4. Confirm the badge appears (can be Idle or Running)

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.

Related to #415399 (closed)