Graphql include authorization for mutations (EE)

What does this MR do?

This is the EE MR for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30243, and add an additional change for EE-specific design mutations.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content