Draft: Split build and test

At some point it might be interesting to split build jobs from testing jobs, specially when testing starts to be costly (e.g. a simulation) and you do not want either to wait until build + test is finished, or even you do not want to run tests (i.e. simulations) for every commit.

This MR is not really intended to be merged, just as a point for discussion.

ci-templates/industrial-ci-templates.yml

@@ -45,6 +45,8 @@ variables:
     key: "${CI_JOB_NAME}"
     paths:
       - ccache
+  tags:
+    - docker
 
 .industrial_ci_test:
   stage: .post