Pipeline: skip test stage to test release

.gitlab-ci.yml

@@ -72,7 +72,7 @@ build:
       - build.tar.gz
 
 # basics_simple.smoke builds on the results of simple -> use only one testing job for all tests
-tests and coverage:
+.tests and coverage:
   stage: test
   script:
     - apt-get -y install numdiff