Improve gitlab-ci script

.gitlab-ci.yml

 ---
-.job_template: &job_configuration
-  script:
-    - duneci-standard-test
-
-gcc-10-20:
-  <<: *job_configuration
-  image: registry.dune-project.org/docker/ci/dune-pdelab-deps:git-debian-11-gcc-10-20
-  before_script:
+before_script: &before
+  - duneci-install-module https://gitlab.dune-project.org/extensions/dune-alugrid.git
   - duneci-install-module https://gitlab.dune-project.org/extensions/dune-foamgrid.git
   - duneci-install-module https://gitlab.dune-project.org/extensions/dune-vtk.git
+
+
+#  Tests with the 2.10 release.
+#------------------------------
+dune:2.10 gcc-10 C++20:
+  image: registry.dune-project.org/docker/ci/dune:2.10-debian-11-gcc-10-20
+  tags: [duneci]
+  variables:
+    DUNECI_BRANCH: releases/2.10
+  before_script:
+  - *before
+  script: duneci-standard-test
+
+dune:2.10 clang-11 C++20:
+  image: registry.dune-project.org/docker/ci/dune:2.10-debian-11-clang-11-20
+  tags: [duneci]
+  variables:
+    DUNECI_BRANCH: releases/2.10
+  before_script:
+  - *before
+  script: duneci-standard-test
+
+
+#  Test with the master branch of the dependencies
+#-------------------------------------------------
+dune:git gcc-12 C++20:
+  image: registry.dune-project.org/docker/ci/dune:git-debian-12-gcc-12-20
+  tags: [duneci]
+  before_script:
+  - *before
+  script: duneci-standard-test
+
+dune:git clang-13 C++20:
+  image: registry.dune-project.org/docker/ci/dune:git-debian-11-clang-13-20
+  tags: [duneci]
+  before_script:
+  - *before
+  script: duneci-standard-test
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