Fix the `migration-paths` build for "Fix API Scoping"

• https://gitlab.com/gitlab-org/gitlab-ce/issues/18000 was fixed in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11963, which was merged in on 5th July.
• The migration-paths build, which only runs on master, failed once https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11963 was merged in.
• https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11963 (and the associated EE MR) were reverted in !12660 (merged) and gitlab-ee!2345
• This MR fixes the migration-paths build.