Add download retries option (#9911)

Signed-off-by: tu1h <lihai.tu@daocloud.io>

roles/download/tasks/download_container.yml

@@ -60,7 +60,7 @@
       register: pull_task_result
       until: pull_task_result is succeeded
       delay: "{{ retry_stagger | random + 3 }}"
-      retries: 4
+      retries: "{{ download_retries }}"
       become: "{{ user_can_become_root | default(false) or not download_localhost }}"
       environment: "{{ proxy_env if container_manager == 'containerd' else omit }}"
       when:
@@ -101,7 +101,7 @@
       register: upload_image
       failed_when: not upload_image
       until: upload_image is succeeded
-      retries: 4
+      retries: "{{ download_retries }}"
       delay: "{{ retry_stagger | random + 3 }}"
       when:
         - pull_required