CE backport of gitlab-org/gitlab-ee!15129 (Allow Todos to link to Designs)

What does this MR do?

CE backport of gitlab-org/gitlab-ee!15129.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry for user-facing changes, or community contribution. Check the link for other scenarios.
• [-] 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