Enable new Group Runners administration view

What does this MR do and why?

Note: Blocked by a fix at !82023 (merged)

This change enables runner_list_group_view_vue_ui. The new group runners view via the CI/CD menu in the left navigation bar.

Group owners can now more easily administer and manage the Runners associated with the namespace. The new view includes the summary count of the number of online, offline, and stale runners associated with the group and sub-groups.

• Release post: gitlab-com/www-gitlab-com!100413 (merged)
• Rollout issue: #336405 (closed)

Screenshots or screen recordings

Example URL: http://gdk.test:3000/groups/h5bp/-/runners

How to set up and validate locally

1. As an owner of a group with runners (new view can be visited by Group Owners)
2. Visit the group home page
3. In the sidebar, CI/CD -> Runner should be available.

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 #19819 (closed)