Filter and display stale runners in the UI

Related to #342799 (closed).

Description

In #342799 (closed) we define stale runners as runners that haven't connected in the last three months, we should:

• Filter by stale runners - we should be adding this as an additional value in the existing Status filter attribute
• Display stale runners status as a badge. - see #340324[Runner-List-1.png] for the badge variant and details