Code Insights: Connect capture group insight preivew to GQL api

Created by: vovakulikov

Follow up for https://github.com/sourcegraph/sourcegraph/pull/28701

Series of PR

1. This one creates main layouts for capture group creation UI
2. Create live preview chart for capture group
3. This one

This PR

• Updates live preview layouts (reuses View components for live preview card)
• Fixes validation layout shifts during async validation of creation form fields
• Connects live preview to GQL API