Add test for next Debian stable (trixie)

.gitlab-ci.yml

@@ -57,6 +57,13 @@ base_test:
     VM_IMAGE: "bookworm"
     TEST_DIR: "test/base.ref"
 
+trixie_test:
+  <<: *base_test
+  variables:
+    VM_IMAGE: "trixie"
+    CREATE_ENV_VARS: "-e config.float_debian_dist=trixie"
+    TEST_DIR: "test/base.ref"
+
 full_test:
   <<: *base_test
   variables: