Added warning msg for kubectl get

- added warning description regarding terminated objects to `get` long help message
  - added printing of warning message in case of `get pods` if there are hidden pods
Fixes #22986

pkg/kubectl/sorting_printer.go

@@ -40,6 +40,10 @@ type SortingPrinter struct {
 	Decoder   runtime.Decoder
 }
 
+func (s *SortingPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 func (s *SortingPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
 	if !meta.IsListType(obj) {
 		return s.Delegate.PrintObj(obj, out)