[ci] Use newer Ubuntu (and thus compilers) when testing against dune master

.gitlab-ci.yml

@@ -7,6 +7,7 @@ stages:
 
 variables:
   UBUNTU_VERSION: "22.04"
+  UBUNTU_VERSION_NEWEST: "24.04"
   DUMUX_DOCKER_CI_BRANCH: master
   IMAGE_REGISTRY_URL: $CI_REGISTRY/dumux-repositories/dumux-docker-ci
   DUMUX_CI_TRIGGER_LECTURE_BRANCH: master
@@ -111,7 +112,7 @@ minimal-dune-latest-release-gcc:
 minimal-dune-master-release-clang:
   extends: .base-trigger
   variables:
-    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_minimal:dune-master-clang-ubuntu-$UBUNTU_VERSION
+    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_minimal:dune-master-clang-ubuntu-$UBUNTU_VERSION_NEWEST
 
 full-dune-latest-release-clang:
   extends: .base-trigger
@@ -121,7 +122,7 @@ full-dune-latest-release-clang:
 full-dune-master-gcc-cpp-20:
   extends: .base-trigger
   variables:
-    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-master-gcc-12-ubuntu-$UBUNTU_VERSION
+    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-master-gcc-ubuntu-$UBUNTU_VERSION_NEWEST
     CXX_MAX_STANDARD: "20"
     DUMUX_ENABLE_CPPCHECK: "true"
     DUMUX_ENABLE_DOXYGEN_BUILD: "true"
@@ -132,12 +133,12 @@ full-dune-master-gcc-cpp-20:
 full-dune-master-clang:
   extends: .non-mr-trigger
   variables:
-    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-master-clang-ubuntu-$UBUNTU_VERSION
+    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-master-clang-ubuntu-$UBUNTU_VERSION_NEWEST
 
 full-dune-master-gcc:
   extends: .non-mr-trigger
   variables:
-    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-master-gcc-ubuntu-$UBUNTU_VERSION
+    IMAGE: $IMAGE_REGISTRY_URL/${DUMUX_DOCKER_CI_BRANCH}_full:dune-master-gcc-ubuntu-$UBUNTU_VERSION_NEWEST
 
 ################################################
 # trigger test pipelines of downstream modules #