cicd: merge list_images and setup_image stepcgs

.drone.yml

@@ -33,13 +33,6 @@ steps:
     commands:
       - until docker info; do echo "Waiting for Docker daemon..."; sleep 1; done
       - docker build -t ubuntu_amd64 -f ./tools/docker/linux_amd64 .
-
-  - name: list_images
-    image: docker:latest
-    volumes:
-    - name: dockersock
-      path: /var/run/docker.sock
-    commands:
       - docker images
 
   - name: echo_info