Check whether the action is a CSI action and whether CSI feature is

enabled, before executing the action.

The DeleteItemAction is not checked, because the DIA doesn't have a
method to get the action's plugin name.
This should be OK, because the CSI will check whether the VS and VSC
have a backup name annotation. If the VS and VSC is not handled by
the CSI plugin, then they don't have the annotation.

Signed-off-by: Xun Jiang <jxun@vmware.com>

internal/delete/delete_item_action_handler.go

@@ -119,6 +119,7 @@ func InvokeDeleteActions(ctx *Context) error {
 					if !action.Selector.Matches(labels.Set(obj.GetLabels())) {
 						continue
 					}
+
 					err = action.DeleteItemAction.Execute(&velero.DeleteItemActionExecuteInput{
 						Item:   obj,
 						Backup: ctx.Backup,