Ensure all Kubelet required kernel values are configured when enabling protectKernelDefaults (#8692)

Signed-off-by: Cyril Corbon <corboncyril@gmail.com>

* feat: split kube_feature_gates variable for different kubernetes components

* docs: add kube_feaute_gates componet variables

Signed-off-by: Cyril Corbon <corboncyril@gmail.com>

* [containerd] add hashes for 1.5.11

* [containerd] add hashes for 1.6.2

* [containerd] make 1.6.2 the new default

Due to missing quotation of nerdctl_extra_flags, ansible-playbook was failed:

  Using module file /usr/local/lib/python3.6/dist-packages/ansible/modules/command.py
  Pipelining is enabled.
    [..]
    File "/usr/lib/python3.8/shlex.py", line 191, in read_token
      raise ValueError("No closing quotation")

This fixes the issue.

T-Eberle investigated the issue and found the solution.
Thank you T-Eberle!

If running Kubespray on static IP environments, a task was failed like:

  TASK [kubernetes/preinstall : Configure dhclient hooks for resolv.conf (RH-only)]
  fatal: [ak8s2]: FAILED! => {
    "changed": false, "checksum": "..",
    "msg": "Destination directory /etc/dhcp/dhclient.d does not exist"}

This adds a check for dhclientconffile for running 0100-dhclient-hooks to
run the task only if dhcpclient is enabled.

When running cluster.yml for new machines what containerd is already
install but Kubernetes cluster were not installed before, the task
"remove-node | List nodes" is failed like

  "changed": false,
  "cmd": [
    "/usr/local/bin/kubectl", "--kubeconfig",
    "/etc/kubernetes/admin.conf", "get", "nodes", "-o",
    "go-template={{ range .items }}{{ .metadata.name }}
    {{ "\n" }}{{ end }}"
   ],
   ..
   "stderr": "error: stat /etc/kubernetes/admin.conf: no such file or directory",

That was due to lack to check the existing Kubernetes cluster exists
or not before running "kubectl drain" command.
This adds the check to avoid the issue.

* Updated openstack cloud controller version to match kubernetes version

* Rolled back file structure change

* [calico] make vxlan encapsulation the default

* don't enable ipip encapsulation by default
* set calico_network_backend by default to vxlan
* update sample inventory and documentation

* [CI] pin default calico parameters for upgrade tests to ensure proper upgrade

* [CI] improve netchecker connectivity testing

* [CI] show logs for tests

* [calico] tweak task name

* [CI] Don't run the provisioner from vagrant since we run it in testcases_run.sh

* [CI] move kube-router tests to vagrant to avoid network connectivity issues during netchecker check

* service proxy mode still fails connectivity tests so keeping it manual mode

* [kube-router] account for containerd use-case

* Sketch of helm-apps role interface

* helm-apps: Early implementation and settings

* helm-apps: Fix README.md example playbook

* fixup! Sketch of helm-apps role interface

* Make the argument specs more explicit

* Remove exposed options from hardcoded default

* Simplify example playbook in README.md

- Define directly the roles parameters
- Add an example of option override for one chart only

* Use release instead of charts

Make explicit that the role is mananing releases, not charts.
Simplify parameters naming

[systemd-resolved] Fix DNS configuration according to docs/dns-stack.md and during reset of cluster (#8560) (#8561)

Signed-off-by: Mac Chaffee <me@macchaffee.com>

* Add epoch to docker-ce and docker-ce-cli packages to ensure docker upgrade

* Split container-engine redhat vars to support legacy RHEL 7 version management

* Support ansible_distribution_major_version when disvering vars with ansible_os_family

Signed-off-by: Toni Tauro <toni.tauro@adfinis.com>