Add pause runner button to runner view

What does this MR do and why?

This change adds a "Pause" button to the runner read-only view, it does this by repurposing the "Pause" button in the runner list so it can be reused.

Screenshots or screen recordings

Before	After

See responsive behavior

In this "extreme" case we have wrap the long runner details to keep the buttons in the same line

How to set up and validate locally

1. With some runners added

2. In rails console ($ rails c) enable the the view runner page

   Feature.enable(:runner_read_only_admin_view)

3. Visit Admin -> Runners

4. Visit any Group Runner page such as http://gdk.test:3000/admin/runners/108

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 #347856 (closed)