ci: add tag CI job

See merge request https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer/-/merge_requests/633



Merged-by: Terri Chu <tchu@gitlab.com>
Approved-by: Arturo Herrero <arturo.herrero@gmail.com>
Approved-by: Terri Chu <tchu@gitlab.com>
Reviewed-by: Terri Chu <tchu@gitlab.com>
Co-authored-by: Dmitry Gruzd <dgruzd@gitlab.com>