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

4 jobs for branch/default in 4 minutes and 21 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Lint
passed check-manifest #239217

00:00:43

passed yamllint #239218

00:00:37

 
  Tests
passed py3 #239219

00:02:59

 
  Build Debian Package
manual build-debian #239220
manual