containerd support (#4664)

* Add limited containerd support

Containerd support for Ubuntu + Calico

* Added CRI-O support for ubuntu

* containerd support.

* Reset  containerd support.

* fix lint.

* implemented feedback

* Change task name cri xx instead of cri-o in reset task and timeout condition.

* set crictl to fixed version

* Use docker-ce's container.io package for containerd.

* Add check containerd is installable or not.

* Avoid stop docker when use containerd and optimize retry for reset.

* Add config.toml.

* Fixed containerd for kubelet.env.

* Merge PR #4629

* Remove unused ubuntu variable for containerd

* Polish code for containerd and cri-o

* Refactoring cri socket configuration.

* Configurable conmon.

* Remove unused crictl/runc download

* Now crictl and runc is downloaded by common crictl.yml.

* fixed yamllint error

* Fixed brokenfiles by conflict.

* Remove commented line in config.toml

* Remove readded v1.12.x version

* Fixed broken set_docker_image_facts

* Fix yamllint errors.

* Remove unused apt source

* Fix crictl could not be installed

* Add containerd config from skolekonov's PR #4601

roles/download/tasks/download_prep.yml

@@ -0,0 +1,42 @@
+---
+# Use the same format for Containerd images as for Docker images
+# ctr doesn't have inspect command
+
+- name: Set image info command for containerd
+  set_fact:
+    image_info_command: "{{ containerd_bin_dir }}/ctr images ls | tail -n +2 | awk -F '[ :]+' '{print $1\":\"$2\",\"$1\":\"$4\"@\"$5}' | tr '\n' ','"
+  when: container_manager == 'containerd'
+
+- name: Register docker images info
+  shell: "{{ image_info_command }}"
+  no_log: true
+  register: docker_images
+  failed_when: false
+  changed_when: false
+  check_mode: no
+  when: download_container
+
+- name: container_download | Create dest directory for saved/loaded container images
+  file:
+    path: "{{ local_release_dir }}/containers"
+    state: directory
+    recurse: yes
+    mode: 0755
+    owner: "{{ ansible_ssh_user|default(ansible_user_id) }}"
+  when: download_container
+
+- name: container_download | create local directory for saved/loaded container images
+  file:
+    path: "{{ local_release_dir }}/containers"
+    state: directory
+    recurse: yes
+  delegate_to: localhost
+  delegate_facts: false
+  become: false
+  run_once: true
+  when:
+    - download_run_once
+    - download_delegate == 'localhost'
+    - download_container
+  tags:
+    - localhost