Update New group view

Open Luke "Jared" Bennett requested to merge 20827-getting-started-update-new-group-view into master

What does this MR do?

Updates the New Group page to the design specified in #20827 (moved).

EE port: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1575

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Part of Getting Started meta.

Screenshots (if relevant)



Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

Closes #20827 (moved)