Fix project starrers layout

What does this MR do and why?

• Truncates overflowing text
• Adds space between rows
• Updates search and filter buttons

What does this MR not do?

Fix the Name dropdown border radius --> Remove btn-group class from listbox helper (!138575 - merged)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Go to project starrers page (http://localhost:3000/gitlab-org/gitlab-test/-/starrers)

✂️ UX Paper Cuts 16.7 → Project page (#430244 - closed)