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

@@ -20,7 +20,7 @@ variables:
     CMAKE_ARGS: -DCMAKE_CXX_FLAGS=-Wno-ignored-attributes -Wno-int-in-bool-context -Wno-dev
 
 .industrial_ci_build_notest:
-  stage: .pre
+  stage: build
   services:
     - name: tecnalia-docker-dev.artifact.tecnalia.com/docker:dind
       alias: docker