containerd: download containerd from upstream instead of using distro specific packages (#7970)

* Containerd: download containerd from upstream instead of using distro specific packages

split runc download to separate role
make bootstrap-os role deploy container-selinux and seccomp libraries
clean up package manager provided containerd
move variables to docker role that are no longer common with containerd

* Containerd: make molecule testing more relevant

* replace ubuntu18 with ubuntu20
* add centos8 and debian11 to molecule tests
* run kubernetes/preinstall role to ensure relevancy
  of test including dependency packages

* CI: adjust test scenarios for downloaded containerd

roles/container-engine/runc/tasks/main.yml

@@ -0,0 +1,17 @@
+---
+- name: runc | Uninstall runc package managed by package manager
+  package:
+    name: "{{ runc_package_name }}"
+    state: absent
+
+- name: runc | Download runc binary
+  include_tasks: "../../../download/tasks/download_file.yml"
+  vars:
+    download: "{{ download_defaults | combine(downloads.runc) }}"
+
+- name: Copy runc binary from download dir
+  copy:
+    src: "{{ downloads.runc.dest }}"
+    dest: "{{ runc_bin_dir }}/runc"
+    mode: 0755
+    remote_src: true