CI: Stop publishing OSS images for security mode (#56088)

* No-op: Refactor publish images pipeline struct

* Stop publishing images for OSS

scripts/drone/steps/lib.star

@@ -796,6 +796,23 @@ def build_docker_images_step(edition, ver_mode, archs=None, ubuntu=False, publis
         },
     }
 
+def fetch_images_step(edition):
+    return {
+        'name': 'fetch-images-{}'.format(edition),
+        'image': 'google/cloud-sdk',
+        'environment': {
+            'GCP_KEY': from_secret('gcp_key'),
+            'DOCKER_USER': from_secret('docker_username'),
+            'DOCKER_PASSWORD': from_secret('docker_password'),
+        },
+        'commands': ['./bin/build artifacts docker fetch --edition {}'.format(edition)],
+        'depends_on': ['compile-build-cmd'],
+        'volumes': [{
+            'name': 'docker',
+            'path': '/var/run/docker.sock'
+        }],
+    }
+
 
 def publish_images_step(edition, ver_mode, mode, docker_repo, trigger=None):
     if mode == 'security':