Add namespace flag to kpod ps

The namespace flag prints out information about the namespaces

Signed-off-by: umohnani8 <umohnani@redhat.com>

completions/bash/kpod

@@ -361,6 +361,7 @@ _kpod_ps() {
      --no-trunc
      --quiet -q
      --size -s
+     --namespace --ns
      "
      _complete_ "$options_with_args" "$boolean_options"
 }