Merge branch 'feature/downstream-testing' into 'master'

Enable downstream testing for all core modules

See merge request !913

.gitlab-ci.yml

@@ -18,6 +18,7 @@ debian:10 gcc-7-17--expensive:
   # This image has Vc
   image: registry.dune-project.org/docker/ci/debian:10
   script: duneci-standard-test
+  stage: test
   # allow expensive tests
   variables:
     DUNECI_CXXFLAGS: -mavx
@@ -34,6 +35,7 @@ debian:10 gcc-7-17--expensive:
 debian-11-gcc-9-17-python:
   image: registry.dune-project.org/docker/ci/debian:11
   script: duneci-standard-test
+  stage: test
   variables:
     DUNECI_TOOLCHAIN:  gcc-9-17
     # so we need some variables to build the dune-py module during execution of the first python test:
@@ -49,3 +51,14 @@ debian-11-gcc-9-17-python:
     # finally set the python path to all modules
     PYTHONPATH:        $CI_PROJECT_DIR/build-cmake/python
   tags: [duneci]
+
+system-test:
+  stage: downstream
+  variables:
+    CI_BUILD_REF_NAME: $CI_COMMIT_REF_NAME
+    DUNECI_TEST_LABELS: ""
+  trigger:
+    project: infrastructure/dune-nightly-test
+    branch: core
+    strategy: depend
+  allow_failure: true