Change server creation to include searchable roles

What does this MR do and why?

• Change roles select on creation page to be more intuitive and visible.
• Allow searching through roles for large installs.

Screenshots or screen recordings

How to set up and validate locally

Go to create server screen

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• Have you checked this doesn't interfere/conflict/duplicate someone elses work?
• Have you fully tested your changes?
• Have you resolved any lint issues?
• Have you assigned a reviewer?
• Have you applied correct labels?