vehicle_global_position remove redundant evh and evv

msg/vehicle_global_position.msg

msg/vehicle_status_flags.msg

src/modules/commander/commander.cpp

src/modules/commander/state_machine_helper.cpp

src/modules/ekf2/ekf2_main.cpp

.../local_position_estimator/BlockLocalPositionEstimator.cpp

.../position_estimator_inav/position_estimator_inav_main.cpp