Add option to create snapshot for PVC

'Create Snapshot` action in kebab menu for PVC will allow
user to create in-time images of snapshot.
Signed-off-by: Kanika <kmurarka@redhat.com>

frontend/packages/ceph-storage-plugin/src/components/modals/restore-pvc-modal/restore-pvc-modal.tsx

@@ -16,11 +16,13 @@ import {
   ModalTitle,
   createModalLauncher,
 } from '@console/internal/components/factory';
-import { NamespaceModel, PersistentVolumeClaimModel } from '@console/internal/models';
+import {
+  NamespaceModel,
+  PersistentVolumeClaimModel,
+  VolumeSnapshotModel, // TODO: create a public component for restore modal
+} from '@console/internal/models';
 import { getName, getNamespace } from '@console/shared';
 
-import { VolumeSnapshotModel } from '../../../models';
-
 export const RestorePVCModal = withHandlePromise((props: RestorePVCModalProps) => {
   const { close, cancel, resource, errorMessage, inProgress, handlePromise } = props;
   const [pvcResource, setResource] = React.useState(null);