Fix system-tests build: requires python3.12-venv

Author: smola

.circleci/config.continue.yml.j2

@@ -273,6 +273,10 @@ commands:
             git fetch origin << parameters.systemTestsCommit >>
             git reset --hard FETCH_HEAD
 
+      - run:
+        name: Install dependencies
+        command: apt-get install -y python3.12-venv
+
 jobs:
   build:
     <<: *defaults