api: add volumeGroupAttributes field to VGRContent API

This commit introduces `volumeGroupAttributes` field to
`VolumeGroupReplicationContent` API.

The field is intended to store key-value pairs derived
from the VolumeGroupContext returned by CSI drivers in the
CreateVolumeGroupResponse.

Signed-off-by: Praveen M <m.praveen@ibm.com>

Author: iPraveenParihar

api/replication.storage/v1alpha1/volumegroupreplicationcontent_types.go

@@ -57,6 +57,11 @@ type VolumeGroupReplicationContentSpec struct {
 	// +kubebuilder:validation:Required
 	VolumeGroupReplicationClassName string `json:"volumeGroupReplicationClassName"`
 
+	// volumeGroupAttributes holds the contextual information of the volume group.
+	// +kubebuilder:validation:XValidation:rule="self == oldSelf",message="field is immutable"
+	// +kubebuilder:validation:Optional
+	VolumeGroupAttributes map[string]string `json:"volumeGroupAttributes,omitempty"`
+
 	// Source specifies whether the volume group is (or should be) dynamically provisioned
 	// or already exists using the volumes listed here, and just requires a
 	// Kubernetes object representation.

api/replication.storage/v1alpha1/zz_generated.deepcopy.go

@@ -67,6 +67,15 @@ spec:
                 required:
                 - volumeHandles
                 type: object
+              volumeGroupAttributes:
+                additionalProperties:
+                  type: string
+                description: volumeGroupAttributes holds the contextual information
+                  of the volume group.
+                type: object
+                x-kubernetes-validations:
+                - message: field is immutable
+                  rule: self == oldSelf
               volumeGroupReplicationClassName:
                 description: |-
                   VolumeGroupReplicationClassName is the name of the VolumeGroupReplicationClass from

config/crd/bases/replication.storage.openshift.io_volumegroupreplicationcontents.yaml

@@ -1437,6 +1437,15 @@ spec:
                 required:
                 - volumeHandles
                 type: object
+              volumeGroupAttributes:
+                additionalProperties:
+                  type: string
+                description: volumeGroupAttributes holds the contextual information
+                  of the volume group.
+                type: object
+                x-kubernetes-validations:
+                - message: field is immutable
+                  rule: self == oldSelf
               volumeGroupReplicationClassName:
                 description: |-
                   VolumeGroupReplicationClassName is the name of the VolumeGroupReplicationClass from