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/templates/containerd.service.j2

@@ -0,0 +1,40 @@
+# Copyright The containerd Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[Unit]
+Description=containerd container runtime
+Documentation=https://containerd.io
+After=network.target local-fs.target
+
+[Service]
+ExecStartPre=-/sbin/modprobe overlay
+ExecStart={{ containerd_bin_dir }}/containerd
+
+Type=notify
+Delegate=yes
+KillMode=process
+Restart=always
+RestartSec=5
+# Having non-zero Limit*s causes performance problems due to accounting overhead
+# in the kernel. We recommend using cgroups to do container-local accounting.
+LimitNPROC=infinity
+LimitCORE=infinity
+LimitNOFILE=infinity
+# Comment TasksMax if your systemd version does not supports it.
+# Only systemd 226 and above support this version.
+TasksMax=infinity
+OOMScoreAdjust=-999
+
+[Install]
+WantedBy=multi-user.target

roles/container-engine/containerd/templates/fedora_containerd.repo.j2

@@ -1,7 +0,0 @@
-[docker-ce]
-name=Docker-CE Repository
-baseurl={{ containerd_fedora_repo_base_url }}
-enabled=0
-gpgcheck={{ '1' if containerd_fedora_repo_gpgkey else '0' }}
-gpgkey={{ containerd_fedora_repo_gpgkey }}
-{% if http_proxy is defined %}proxy={{ http_proxy }}{% endif %}

roles/container-engine/containerd/templates/rh_containerd.repo.j2

@@ -1,10 +0,0 @@
-[docker-ce]
-name=Docker-CE Repository
-baseurl={{ docker_rh_repo_base_url }}
-enabled=0
-gpgcheck={{ '1' if docker_rh_repo_gpgkey else '0' }}
-keepcache={{ docker_rpm_keepcache | default('1') }}
-gpgkey={{ docker_rh_repo_gpgkey }}
-{% if http_proxy is defined %}
-proxy={{ http_proxy }}
-{% endif %}