DAST Profile Selector UI changes

What does this MR do?

Related #292475 (closed)

This adds few the design improvements for DAST Profile selectors in On-demand Scans form.

• Remove Manage profiles buttons from the profile selectors
• Add a Manage profiles / `Manage DAST Scans button at the top of the form
• Add Edit profile icon
• Profile selector dropdown
  • Add search filter using GlSearchBoxByType
  • Add fixed rows to create and manage profiles
  • Update styling

Screenshots (strongly suggested)

• On-demand scan form

Before	After

• Profile selector dropdown

Before	After

Follow-ups

• gitlab-ui#1156 (closed)
• gitlab-ui#150 (closed)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry

How to test this

• Pull latest changes in gitlab-ui repo, and follow steps to include in your gitlab project https://gitlab.com/gitlab-org/gitlab-ui/-/blob/master/doc/contributing/gitlab_integration_test.md#testing-your-changes-in-a-local-gitlab-instance
• Visit your gdk instance - http://gitlab.local:3000/group/project/-/on_demand_scans

Note

There are some dependent gitlab-ui changes yet to be deployed gitlab-ui!1981 (merged) (merged)