Docker image for the triggered build is double sized
Related to #2234 (closed)
When build is triggered from CE, eg. https://gitlab.com/gitlab-org/gitlab-ce/builds/15661103 the end Docker image is double in size because of the package that is embedded in a layer.
We should solve this either as we solved this for regular builds or we could look into querying the API to fetch the artifact as the download url.