Combine compliance-relates features on global navigation

What does this MR do and why?

For: https://gitlab.com/gitlab-com/gitlab-OKRs/-/work_items/3102, let's move compliance-relates features together in one place on the global navigation.

Screenshots, screen recordings, or links to review app

Preview: https://eread-combine-compliance-related-features-on-global-nav.docs.gitlab-review.app/ee/administration/compliance.html.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Configure a local GitLab Docs environment: https://gitlab.com/gitlab-org/gitlab-docs/-/blob/main/doc/setup.md.

Merge request acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this merge request.