Update "Upgrade your plan to improve repositories" banner

What does this MR do and why?

• hide the banner when search produced no results
• update illustration
• remove the old one

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

1. Go to http://gdk.test:3000/Commit451/lab-coat/-/settings/repository
2. Scroll down
3. See the banner
4. Try to search something like test
5. See "No results found" message, but ton the banner

#452225 (closed)