Add universal ctags to zoekt CI image (!783) · Merge requests · GitLab.org / gitlab-build-images · GitLab

What does this MR do and why?

Add ctags installation as recommended by universal-ctags folks: https://github.com/universal-ctags/ctags-docker/blob/master/Dockerfile

Checklist

(If applicable) Add patches if required for upgrading Ruby version in https://gitlab.com/gitlab-org/gitlab-build-images/-/tree/master/patches/ruby.