* Add support for crun v0.19

* Change default crun version to v0.19

See: `https://github.com/cloudnativelabs/kube-router/releases/tag/v1.2.0`

This replaces kube-master with kube_control_plane because of [1]:

  The Kubernetes project is moving away from wording that is
  considered offensive. A new working group WG Naming was created
  to track this work, and the word "master" was declared as offensive.
  A proposal was formalized for replacing the word "master" with
  "control plane". This means it should be removed from source code,
  documentation, and user-facing configuration from Kubernetes and
  its sub-projects.

NOTE: The reason why this changes it to kube_control_plane not
      kube-control-plane is for valid group names on ansible.

[1]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint/README.md#motivation

* Add crun download_url and checksum

* Change versioning format to crun native versioning

* Download crun using download_file.yml

* Get crun version from download defaults

* Delegate crun binary copy task to crun role

* Download Calico KDD CRDs

* Replace kustomize with lineinfile and use ansible assemble module

* Replace find+lineinfile by sed in shell module to avoid nested loop

* add condition on sed

* use block for kdd tasks + remove supernumerary kdd manifest apply in start "Start Calico resources"

Since a790935d all proxy users
should be properly configured

Now when you have *_PROXY vars in your environment it can leads to failure
if NO_PROXY is not correct, or to persistent configuration changes
as seen with kubeadm in 1c5391dd

Instead of playing constant whack-a-bug, inject empty *_PROXY vars everywhere
at the play level, and override at the task level when needed

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

* update Cinder CSI to v1.19.0

* Update Cinder CSI to v1.20

* Move proxy_env to kubespray-defaults/defaults

There is no reasons to use set_facts here

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

* Ensure kubeadm doesn't use proxy

*_proxy variables might be present in the environment (/etc/environment, bash profile, ...)
When this is the case we end up with those proxy configuration in /etc/kubernetes/manifests/kube-*.yaml manifests

We cannot unset env variables, but kubeadm is nice enough to ignore empty vars
https://github.com/kubernetes/kubernetes/blob/93d288e2a47fa6d497b50d37c8b3a04e91da4228/cmd/kubeadm/app/util/env.go#L27



Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

By default Ansible stat module compute checksum, list extended attributes and find mime type
To find all stat invocations that really use one of those:
git grep -F stat. | grep -vE 'stat.(islnk|exists|lnk_source|writeable)'

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

Helm v3.5.2 is a security (patch) release. Users are strongly
recommended to update to this release. It fixes two security issues in
upstream dependencies and one security issue in the Helm codebase.

See https://github.com/helm/helm/releases/tag/v3.5.2

Fix issue #7129. Calico image tags support multiarch on quay.io.

TASK [Generate a list of information about the images on a node]
registers list of container images to docker_images.
Then the next TASK [Set pull_required if the desired image is not
yet loaded] does based on expecting images are registered.
However sometimes the first TASK was failed as [1] but the failure
is ignored due to failed_when:false and it makes another issue.
This removes this unnecessary failed_when to detect the failure
at the point.
In addition, this removes no_log:true also because the output doesn't
contain any sensitive data and now it just makes debugging difficult.

[1]: https://gitlab.com/kargo-ci/kubernetes-sigs-kubespray/-/jobs/934714534#L2953

no_proxy is a pain to get right, and having proxy variables present causes issues
(k8s components get proxy configuration after upgrade, see #7100)

It's better to only configure what require proxy:
- the runtime (containerd/docker/crio)
- the package manager + apt_key
- the download tasks

Tested with the following clusters
- 4 CentOS 8 nodes
- 1 Ubuntu 20.04 node

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* download run once feature for CRI-O

* fix typo

* fix test

* SHAs for 1.19.6, 1.18.14, 1.18.13, 1.17.16 and 1.17.15

* Fix etcd version in README

* Bump kube_version to 1.19.6