.gitlab-ci.yml: move also test_functional

See #3431.

.gitlab-ci.yml

@@ -13,7 +13,6 @@ stages:
   - test_unit
   - deploy_review
   - test_germlines
-  - test_functional
   - test_shouldvdj
   - coverage
   - prepare_release
@@ -24,6 +23,7 @@ stages:
   - prepare_deploy
   - deploy_docker
   - deploy_prod
+  - test_functional
   - test_functional_external
 
 # Anchors