Because of a browser don't respect the loading order of the scripts,
sometimes `s__` function was not defined. This caused an error and the
spec failed.

Adding `Vue.use(Translate)` remediates this issue.

A more proper solution has been proposed here: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/156523

Closes: https://gitlab.com/gitlab-org/gitlab/-/issues/451668

Closes: https://gitlab.com/gitlab-org/gitlab/-/issues/435388