message: telemetry: fix local position health flag
  This flas was actually just fake before and a duplicate of the GPS
  available flag.
diff: @@ -501,6 +501,8 @@ void TelemetryImpl::process_position_velocity_ned(const mavlink_message_t& messa
  auto arg = position_velocity_ned();
  _parent->call_user_callback([callback, arg]() { callback(arg); });
  }
  +
  + set_health_local_position(true);
  }
  void TelemetryImpl::process_global_position_int(const mavlink_message_t& message)
  @@ -732,8 +734,6 @@ void TelemetryImpl::process_gps_raw_int(const mavlink_message_t& message)
  const bool gps_ok = ((gps_raw_int.fix_type >= 3) && (gps_raw_int.satellites_visible >= 8));
  set_health_global_position(gps_ok);
  - // Local is not different from global for now until things like flow are in place.
  - set_health_local_position(gps_ok);
  if (_gps_info_subscription) {
  auto callback = _gps_info_subscription;
  