Adjust placement of DAST profile conflict banner

What does this MR do and why?

Fixes #362929 (closed)

Screenshots or screen recordings

before	after

How to set up and validate locally

1. Create a new On-demand scan
2. Select an active scanner profile
3. Select an unvalidated site profile
4. A banner should be displayed

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.