Internationalisation of vue_shared directory
What does this MR do?
i18n the vue_shared directory
This is one of many MRs opened in order to improve the overall internationalisation of the GitLab codebase.
This MR only targets the Vanilla JS files.
https://docs.gitlab.com/ee/development/i18n/externalization.html
Related issue is https://gitlab.com/gitlab-org/gitlab-ce/issues/59733