Automatically deploy CSI plugin and driver for supported providers, and add support for OpenStack Cinder CSI

[xmudrii]

What this PR does / why we need it:

This PR introduces the following changes:

• OpenStack CCM version now depends on the Kubernetes version
  • Clusters running Kubernetes v1.17 and older will use OpenStack CCM v1.17, while newer clusters will use the recommended CCM version (e.g. 1.22 clusters will use CCM v1.22.0)
  • This ensures our users can use the latest features, while still respecting the compatibility matrix proposed by the OpenStack CCM team
• Deploy CSI plugin for supported clusters by default
  • Currently, this is supported only for Hetzner and OpenStack
  • The StorageClass is not created by default, so the user should do that manually
• Add support for OpenStack Cinder CSI plugin/driver
  • The minimum cluster version for OpenStack Cinder CSI is v1.17.0

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Relevant and required for #1451

Special notes for your reviewer:

I've used the following manifest to test the Cinder CSI plugin. I've tested it on 1.17 and 1.22 clusters. Other versions will follow up.

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  annotations:
    storageclass.beta.kubernetes.io/is-default-class: "true"
  labels:
    kubernetes.io/cluster-service: "true"
  name: cinder-csi
provisioner: cinder.csi.openstack.org
volumeBindingMode: WaitForFirstConsumer
---
# Source: https://github.com/kubernetes/cloud-provider-openstack/blob/master/examples/cinder-csi-plugin/resize/example.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: csi-pvc-cinderplugin
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: cinder-csi
---
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - image: nginx
    imagePullPolicy: IfNotPresent
    name: nginx
    ports:
    - containerPort: 80
      protocol: TCP
    volumeMounts:
      - mountPath: /var/lib/www/html
        name: csi-data-cinderplugin
  volumes:
  - name: csi-data-cinderplugin
    persistentVolumeClaim:
      claimName: csi-pvc-cinderplugin
      readOnly: false

Does this PR introduce a user-facing change?:

* OpenStack CCM version now depends on the Kubernetes version. Clusters running Kubernetes v1.17 and older will use OpenStack CCM v1.17, while newer clusters will use the recommended CCM version (e.g. 1.22 clusters will use CCM v1.22.0)
* Deploy CSI plugin for supported clusters by default. Currently, this is supported for Hetzner and OpenStack (the minimum cluster version for OpenStack is v1.17.0). The StorageClass is not created by default, so the user should do that manually.
* Add support for OpenStack Cinder CSI plugin/driver

/assign @kron4eg
/hold
for additional manual testing

[kubermatic-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xmudrii

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[kubermatic-bot]

LGTM label has been added.

Git tree hash: 4ca5fb5a8aee6a5759d7edf902aba4a057d487cf

[xmudrii]

/hold cancel