Upgrade base images to Debian 12
CNG now uses Debian 12 (Upgrade debian from bullseye to bookworm (gitlab-org/build/CNG!1616 - merged)) so our CI image and agentk images can also start using it.
CNG now uses Debian 12 (Upgrade debian from bullseye to bookworm (gitlab-org/build/CNG!1616 - merged)) so our CI image and agentk images can also start using it.