ci(gitlab-ci): use templates from a common repository

6 jobs for branch/default in 2 minutes and 25 seconds (queued for 14 minutes and 35 seconds)
Name Stage Failure
safety Lint
| before JSON parsing is attempted (admittedly an rdflib-jsonld issue)         |
| - denial of service, if web or task workers are tied up waiting for extended |
| periods for HTTP requests to complete |
| - attackers being able to probe the local filesystem using file:// URLs |
| |
WARNING: There was an error checking the latest version of pip.
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1