🌱 Add ClusterClass column to Cluster CRD

[sbueringer]

Signed-off-by: Stefan Büringer [email protected]

What this PR does / why we need it:
Adds a ClusterClass column to the Cluster CRD. Super helpful to determine if a Cluster is a classy cluster, and if yes which ClusterClass it uses

k get clusterclass,cluster,kcp,md
NAME                                        AGE
clusterclass.cluster.x-k8s.io/quick-start   5m44s

NAME                                       CLUSTERCLASS   PHASE         AGE     VERSION
cluster.cluster.x-k8s.io/capi-quickstart                  Provisioned   5m50s
cluster.cluster.x-k8s.io/my-cluster        quick-start    Provisioned   5m41s   v1.26.0

NAME                                                                              CLUSTER           INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE     VERSION
kubeadmcontrolplane.controlplane.cluster.x-k8s.io/capi-quickstart-control-plane   capi-quickstart   true                                 1                  1         1             5m50s   v1.25.0
kubeadmcontrolplane.controlplane.cluster.x-k8s.io/my-cluster-465k6                my-cluster        true                                 1                  1         1             5m41s   v1.26.0

NAME                                                                        CLUSTER           REPLICAS   READY   UPDATED   UNAVAILABLE   PHASE       AGE     VERSION
machinedeployment.cluster.x-k8s.io/capi-quickstart-md-0                     capi-quickstart   1                  1         1             ScalingUp   5m50s   v1.25.0
machinedeployment.cluster.x-k8s.io/my-cluster-default-worker-topo-1-qsrp5   my-cluster        1                  1         1             ScalingUp   5m40s   v1.26.0
machinedeployment.cluster.x-k8s.io/my-cluster-default-worker-topo-2-gx42r   my-cluster        1                  1         1             ScalingUp   5m40s   v1.26.0
machinedeployment.cluster.x-k8s.io/my-cluster-default-worker-topo-3-jmwvt   my-cluster        1                  1         1             ScalingUp   5m40s   v1.26.0

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

[killianmuldoon]

/area api

(just barely)

[killianmuldoon]

/lgtm
/approve
/hold

Feel free to unhold - just in case anyone else wants to take a look as it's an API change.

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 250588dc8844c2aaacdef07428f470d01c01b95e

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: killianmuldoon

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [killianmuldoon]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sbueringer]

Debatable if the columns of the CRD are an API :D

But let's not go there. Thx for the review, I'll keep it open for a few days, I'm not in a rush

[furkatgofurov7]

/lgtm

[killianmuldoon]

/hold cancel