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/containerd/molecule/default/prepare.yml

@@ -2,5 +2,10 @@
 - name: Prepare
   hosts: all
   gather_facts: False
+  become: true
+  vars:
+    ignore_assert_errors: true
   roles:
+    - role: kubespray-defaults
     - role: bootstrap-os
+    - { role: kubernetes/preinstall, tags: ["bootstrap-os"] }