Refactor download role (#5697)

* download file

* download containers

* fix push image to nodes

* pull if none image on host

* fix

* improve docker image tag checks.
do not pull already cached images

* rebase fix merge conflict

* add support download_run_once when upgrade and scale cluster
add some test with download_run_once

* set default values to temp flag for every download cycle

* add save,load abilty for containerd and crio when download_run_once=true

* return redefine image save/load command to  set_docker_image_facts.yml

* move set command to set_container_facts

* ctr in containerd_bin_dir

* fix order of ctr image export arguments

* temporary disable download_run_once for containerd and crio
due https://github.com/containerd/containerd/issues/4075

* remove unused files

* fix strict yaml linter warning and errors

* refactor logical conditions to pull and cache container images

* remove comment due lint check

* document role

* remove image_load_on_localhost, because cached images are always loaded to docker on remote sites

* remove XXX from debug output

roles/download/tasks/set_container_facts.yml

@@ -21,3 +21,14 @@
   set_fact:
     image_path_cached: "{{ download_cache_dir }}/images/{{ image_filename }}"
     image_path_final: "{{ local_release_dir }}/images/{{ image_filename }}"
+
+- name: Set image save/load command for containerd and crio
+  set_fact:
+    image_save_command: "{{ containerd_bin_dir }}/ctr -n k8s.io image export {{ image_path_final }} {{ image_reponame }}"
+    image_load_command: "{{ containerd_bin_dir }}/ctr -n k8s.io image import --base-name {{ download.repo }} {{ image_path_final }}"
+  when: container_manager in ['crio' ,'containerd']
+
+- name: Set image save/load command for containerd and crio on localhost
+  set_fact:
+    image_save_command_on_localhost: "{{ containerd_bin_dir }}/ctr -n k8s.io image export {{ image_path_cached }} {{ image_reponame }}"
+  when: container_manager_on_localhost in ['crio' ,'containerd']