Code Insights: Update creation insight intro page

Created by: vovakulikov

Context

Designs: https://www.figma.com/file/qomcHxvHjrwfS3We6NVHGh/Automatically-generated-data-series-%5Breview%5D?node-id=260%3A11

In order to support the capture group's insight (brand new insight type), we have to revisit our creation insight intro page and refresh the layout and visual aspects there.