Merge branch 'fix/patches-check' into 'master'

Move exercise solution checker to testing pipeline.

See merge request !250

.gitlab-ci.yml

 stages:
   - trigger pipelines
   - deploy
-  - solution checker
 
 variables:
   DUMUX_DOCKER_CI_BRANCH: master
@@ -61,10 +60,4 @@ pages:
     paths:
     - public
   only:
-    - master
-
+    - master
\ No newline at end of file
-apply_patches:
-  stage: solution checker
-  image: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-$DUMUX_CI_DUNE_LATEST_RELEASE-gcc-ubuntu-22.04
-  script:
-    - sh .patches/apply_patches.sh

.gitlab-ci/default.yml

@@ -2,6 +2,7 @@ default:
   image: $IMAGE
 
 stages:
+  - solution checker
   - configure
   - build
   - test
@@ -20,6 +21,11 @@ variables:
   DUMUX_TRIGGER_COMMIT_SHA: ""
   DUMUX_TRIGGER_REF_SHA: ""
 
+apply_patches:
+  stage: solution checker
+  script:
+    - sh .patches/apply_patches.sh
+
 select tests:
   stage: configure
   before_script: