message: Add namespace to istio error toaster message
diff: @@ -151,7 +151,7 @@ class IstioConfigDetailsPage extends React.Component<RouteComponentProps<IstioCo
  isRemoved: true
  });
  AlertUtils.addError(
  - 'Could not fetch ' + props.objectType + ':' + props.object + '. Has it been removed ?',
  + `Could not fetch ${props.objectType}: ${props.object} in namespace: ${props.namespace}. Has it been removed?`,
  error
  );
  });
  @@ -179,7 +179,7 @@ class IstioConfigDetailsPage extends React.Component<RouteComponentProps<IstioCo
  isRemoved: true
  });
  AlertUtils.addError(
  - 'Could not fetch Istio object type [' + props.objectType + '] name [' + props.object + '].',
  + `Could not fetch Istio object type [${props.objectType}] name [${props.object}] in namespace [${props.namespace}].`,
  error
  );
  });
  