Add IS_GET_GAINBOOST support to IDS uEye plugin

- Add gain-boost property to gstidsueyesrc (boolean)
- Implement is_SetGainBoost() API call in property setter and framerate/exposure function
- Add UDP control commands SET_GAIN_BOOST and GET_GAIN_BOOST
- Add --gain-boost command-line flag to launch-ids.py
- Update camera_control.py with get-gain-boost and set-gain-boost commands
- Change parameter defaults to None (exposure, framerate, gain) to respect INI file defaults
- Only set properties when explicitly provided by user - INI file is source of truth

sys/idsueye/gstidsueyesrc.h

@@ -60,6 +60,7 @@ struct _GstIdsueyeSrc
   gint gain;
   gboolean auto_exposure;
   gboolean auto_gain;
+  gboolean gain_boost;
 
   GstClockTime acq_start_time;
   guint32 last_frame_count;