[geofencing-subscriptions]: MultieventSubscriptionNotSupported instead of PermissionDenied.

[dfischer-tech]

Problem description
The example for CreateSubscriptionUnprocessableEntity422 - MultieventSubscriptionNotSupported instead of PermissionDenied.

MultieventSubscriptionNotSupported:
  value:
    status: 422
      code: MULTIEVENT_SUBSCRIPTION_NOT_SUPPORTED
      message: Multi event types subscription not managed

[alpaycetin74]

Is there a decision in Commonalities for this type of error, @bigludo7 @jlurien ?
Instead of "not managed", we could say "not supported".