Create CnsUnregisterVolume CRD during CNS Operator init in WCP

[gohilankit]

What this PR does / why we need it: This is a first PR in what will be a series of PRs to add CnsUnregisterVolume API in CSI driver to support export workflow in WCP. It creates CnsUnregisterVolume CRD in the cluster during CNS Operator init.
(Subsequent PRs will add a controller to handle CnsUnregisterVolume CRs and required RBAC changes)

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

Testing done: Deployed the changes on a Supervisor cluster and verified that CRD got created during syncer init.

root@421bcb93bc658ca6c8f2e696c7e3dd4b [ ~ ]# kubectl get pods -n vmware-system-csi
NAME                                      READY   STATUS    RESTARTS      AGE
vsphere-csi-controller-7bcbb97c5b-kqdqc   7/7     Running   0             20s
vsphere-csi-webhook-68c6584d9f-59npw      1/1     Running   0             14d
vsphere-csi-webhook-68c6584d9f-fz5m2      1/1     Running   2 (14d ago)   14d

Syncer logs:

root@421bcb93bc658ca6c8f2e696c7e3dd4b [ ~ ]# kubectl logs vsphere-csi-controller-7bcbb97c5b-kqdqc -c vsphere-syncer -n vmware-system-csi -f
.
.
{"level":"info","time":"2024-07-17T22:27:39.614294869Z","caller":"manager/init.go:175","msg":"\"cnsunregistervolumes\" CRD is created successfully","TraceId":"3da276ab-172b-404c-ad9f-247244083b53"}
.
.

Verify CRD creation on cluster:

root@421bcb93bc658ca6c8f2e696c7e3dd4b [ ~ ]# kubectl get crd | grep cnsunregister
cnsunregistervolumes.cns.vmware.com                              2024-07-17T22:27:39Z     <---------

root@421bcb93bc658ca6c8f2e696c7e3dd4b [ ~ ]# kubectl describe crd cnsunregistervolumes.cns.vmware.com
Name:         cnsunregistervolumes.cns.vmware.com
Namespace:
Labels:       <none>
Annotations:  controller-gen.kubebuilder.io/version: v0.13.0
API Version:  apiextensions.k8s.io/v1
Kind:         CustomResourceDefinition
Metadata:
  Creation Timestamp:  2024-07-17T22:27:39Z
  Generation:          1
  Resource Version:    13919805
  UID:                 8a049ed4-a309-4ef4-bb61-acadad047cfd
Spec:
  Conversion:
    Strategy:  None
  Group:       cns.vmware.com
  Names:
    Kind:       CnsUnregisterVolume
    List Kind:  CnsUnregisterVolumeList
    Plural:     cnsunregistervolumes
    Singular:   cnsunregistervolume
  Scope:        Namespaced
  Versions:
    Name:  v1alpha1
    Schema:
      openAPIV3Schema:
        Description:  CnsUnregisterVolume is the Schema for the cnsunregistervolumes API
        Properties:
          API Version:
            Description:  APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
            Type:         string
          Kind:
            Description:  Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
            Type:         string
          Metadata:
            Type:  object
          Spec:
            Description:  CnsUnregisterVolumeSpec defines the desired state of CnsUnregisterVolume
            Properties:
              Pvc Name:
                Description:  Name of the PVC to be unregistered.
                Pattern:      ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
                Type:         string
            Required:
              pvcName
            Type:  object
          Status:
            Description:  CnsUnregisterVolumeStatus defines the observed state of CnsUnregisterVolume
            Properties:
              Error:
                Description:  The last error encountered during export operation, if any. This field must only be set by the entity completing the export operation, i.e. the CNS Operator.
                Type:         string
              Unregistered:
                Description:  Indicates the volume is successfully unregistered. This field must only be set by the entity completing the unregister operation, i.e. the CNS Operator.
                Type:         boolean
            Required:
              unregistered
            Type:  object
        Type:      object
    Served:        true
    Storage:       true
Status:
  Accepted Names:
    Kind:       CnsUnregisterVolume
    List Kind:  CnsUnregisterVolumeList
    Plural:     cnsunregistervolumes
    Singular:   cnsunregistervolume
  Conditions:
    Last Transition Time:  2024-07-17T22:27:39Z
    Message:               no conflicts found
    Reason:                NoConflicts
    Status:                True
    Type:                  NamesAccepted
    Last Transition Time:  2024-07-17T22:27:39Z
    Message:               the initial names have been accepted
    Reason:                InitialNamesAccepted
    Status:                True
    Type:                  Established
  Stored Versions:
    v1alpha1
Events:  <none>

Special notes for your reviewer:

Release note:

Create CnsUnregisterVolume CRD during CNS Operator init in WCP in syncer

[divyenpatel]

/ok-to-test

[k8s-ci-robot]

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