DRY out Vue.use(Translate)

From slack

Include Vue.use(Translate) in vue_shared/translate.js, and remove usages from individual components.

we have 30+ instances of import Vue from 'vue'; import Translate from '~/vue_shared/translate'; Vue.use(Translate);

Some other discussion of this in https://gitlab.com/gitlab-org/gitlab-ce/issues/43642