Update promote_mr_features user callout to BannerComponent

What does this MR do and why?

This MR updates the user callout in ee/app/views/shared/promotions/_promote_mr_features.html.haml to the ViewComponent to make it Pajamas complaint.

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Use not licensed GDK
2. Go to Project -> Settings -> General -> Merge requests

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.

Review progress:

• UX review
• test Quality review
• frontend developer review
• frontend maintainer review

Closes #362757 (closed), #364019 (closed)