Don't ignore dependency files that are not affected

What does this MR do?

Don't ignore dependency files that are not affected, otherwise their dependencies won't be listed in the Dependency Scanning report.

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ee/issues/12284

Does this MR meet the acceptance criteria?

• Changelog entry added
• [-] Documentation created/updated for GitLab EE, if necessary
• [-] Documentation created/updated for this project, if necessary
• [-] Documentation reviewed by technical writer or follow-up review issue created
• [-] Tests added for this feature/bug - manual test b/c this scenario conflicts with the existing integration test
• [-] Job definition updated, if necessary
• [-] Conforms to the code review guidelines
• [-] Conforms to the Go guidelines
• [-] Security reports checked/validated by reviewer