Dependency List - Connect frontend to backend - rails view

What does this MR do?

Adds the rails view for the Dependency List. This MR is one of two MRs that will complete #11396 (closed). The other MR adds the client-side entry points and root Vue app.

CE port: gitlab-ce!29189

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Separation of EE specific content

Performance and testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.