Fix make mocks command
What does this MR do?
Fix make mocks command
Why was this MR needed?
In 12-9-stable
we still use the old method of installing mocks which
was changed in 13.0 in
!2085 (merged). This
causes a failure in the stable pipeline in
https://gitlab.com/gitlab-org/gitlab-runner/pipelines/151468030
d6c332bb