Docs feedback: Specify needed scopes for GitLab integration application

Problem

Taken from the page documentation explaining how to integrate GitLab application into a self-hosted instance (https://docs.gitlab.com/ee/integration/gitlab.html):

If you:

• Plan to use the importer, you can leave scopes as they are.

The problem is that by default, none of the scopes are selected, only the Confidential checkbox is ticked, and trying to save an application in that state produces an error:

Before click on Save application	After click on Save application

So, what are the required scopes so we can update the docs accordingly?

Proposed solution

Update the documentation to direct users to use Gitlab Migration to achieve the same result and more.

The integration part of logging in with .com account will be unchanged.