move IMU integration out of drivers to sensors hub to handle accel/gyro sync

- IMU integration move from drivers (PX4Accelerometer/PX4Gyroscope) to sensors/vehicle_imu 
 - sensors: voted_sensors_update now consumes vehicle_imu
 - delete sensor_accel_integrated, sensor_gyro_integrated
 - merge sensor_accel_status/sensor_gyro_status into vehicle_imu_status
 - sensors status output minor improvements (ordering, whitespace, show selected sensor device id and instance)

src/modules/sensors/vehicle_angular_velocity/VehicleAngularVelocity.cpp

@@ -43,7 +43,7 @@ namespace sensors
 
 VehicleAngularVelocity::VehicleAngularVelocity() :
 	ModuleParams(nullptr),
-	WorkItem(MODULE_NAME, px4::wq_configurations::rate_ctrl),
+	ScheduledWorkItem(MODULE_NAME, px4::wq_configurations::rate_ctrl),
 	_corrections(this, SensorCorrections::SensorType::Gyroscope)
 {
 	_lp_filter_velocity.set_cutoff_frequency(kInitialRateHz, _param_imu_gyro_cutoff.get());
@@ -68,7 +68,10 @@ bool VehicleAngularVelocity::Start()
 		return false;
 	}
 
-	ScheduleNow();
+	if (!SensorSelectionUpdate(true)) {
+		ScheduleDelayed(10_ms);
+	}
+
 	return true;
 }
 
@@ -218,6 +221,9 @@ void VehicleAngularVelocity::ParametersUpdate(bool force)
 
 void VehicleAngularVelocity::Run()
 {
+	// backup schedule
+	ScheduleDelayed(10_ms);
+
 	// update corrections first to set _selected_sensor
 	bool selection_updated = SensorSelectionUpdate();
 
@@ -311,11 +317,9 @@ void VehicleAngularVelocity::Run()
 
 void VehicleAngularVelocity::PrintStatus()
 {
-	PX4_INFO("selected sensor: %d (%d)", _selected_sensor_device_id, _selected_sensor_sub_index);
-	PX4_INFO("bias: [%.3f %.3f %.3f]", (double)_bias(0), (double)_bias(1), (double)_bias(2));
-
-	PX4_INFO("sample rate: %.3f Hz", (double)_update_rate_hz);
-
+	PX4_INFO("selected sensor: %d (%d), rate: %.1f Hz",
+		 _selected_sensor_device_id, _selected_sensor_sub_index, (double)_update_rate_hz);
+	PX4_INFO("estimated bias: [%.3f %.3f %.3f]", (double)_bias(0), (double)_bias(1), (double)_bias(2));
 	_corrections.PrintStatus();
 }