[.gitlab-ci] include salsa pipeline for debian packaging

14 jobs for topic/default/test-salsa-pipeline in 5 minutes and 1 second (queued for 19 seconds)
Name Stage Failure
extract-source Provisioning
$ mkdir -p ${WORKING_DIR} # collapsed multi-line command
gbp:info: Fetching from default remote for each branch
gbp:error: /builds/cubicweb/cubes/elasticsearch is not a git repository
Running after_script
Uploading artifacts for failed job
Uploading artifacts...
/builds/cubicweb/cubes/elasticsearch/debian/output/: found 1 matching files

Uploading artifacts to coordinator... ok
id=109722 responseStatus=201 Created token=ReDGtxxs
ERROR: Job failed: command terminated with exit code 1