Introduce v1beta2 VolumeGroupSnapshot API

This commit introduces the new VolumeGroupSnapshot v1beta2 API, updates
the CRD and the generated code.

Both v1beta1 and v1beta2 APIs are served, with v1beta1 being the stored
version.

Author: leonardoce

client/apis/volumegroupsnapshot/v1beta2/doc.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2025 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// +k8s:deepcopy-gen=package
+// +groupName=groupsnapshot.storage.k8s.io
+
+package v1beta2

client/apis/volumegroupsnapshot/v1beta2/register.go

@@ -0,0 +1,57 @@
+/*
+Copyright 2025 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1beta2
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// GroupName is the group name use in this package.
+const GroupName = "groupsnapshot.storage.k8s.io"
+
+var (
+	// SchemeBuilder is the new scheme builder
+	SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
+	// AddToScheme adds to scheme
+	AddToScheme = SchemeBuilder.AddToScheme
+	// SchemeGroupVersion is the group version used to register these objects.
+	SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: "v1beta2"}
+)
+
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+func init() {
+	// We only register manually written functions here. The registration of the
+	// generated functions takes place in the generated files. The separation
+	// makes the code compile even when the generated files are missing.
+	SchemeBuilder.Register(addKnownTypes)
+}
+
+// addKnownTypes adds the set of types defined in this package to the supplied scheme.
+func addKnownTypes(scheme *runtime.Scheme) error {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&VolumeGroupSnapshotClass{},
+		&VolumeGroupSnapshotClassList{},
+		&VolumeGroupSnapshot{},
+		&VolumeGroupSnapshotList{},
+		&VolumeGroupSnapshotContent{},
+		&VolumeGroupSnapshotContentList{},
+	)
+	metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
+	return nil
+}