stack sizes: reduce stack sizes for modules that use sensor_combined

...es/attitude_estimator_ekf/attitude_estimator_ekf_main.cpp

...odules/attitude_estimator_q/attitude_estimator_q_main.cpp

src/modules/commander/commander.cpp

src/modules/ekf2/ekf2_main.cpp

.../position_estimator_inav/position_estimator_inav_main.cpp

src/modules/sensors/sensors.cpp