rng height: reset to baro using common logic

The failsafe from rng height to baro height should occur after a reset
to baro triggered by the controlHeightSensorTimeouts function and not in
the fusion selector.

Until now, the EKF was fusing baro measurements between rng updates if
the range finder ODR was slower than the EKF update rate. This is not
the case anymore as the height reset occurs after 5 seconds.

The unit test has been extended to show this behavior.

EKF/sensor_range_finder.hpp

@@ -57,6 +57,7 @@ public:
 	void runChecks(uint64_t current_time_us, const matrix::Dcmf &R_to_earth);
 	bool isHealthy() const override { return _is_sample_valid; }
 	bool isDataHealthy() const override { return _is_sample_ready && _is_sample_valid; }
+	bool isRegularlySendingData() const override { return _is_regularly_sending_data; }
 
 	void setSample(const rangeSample &sample) {
 		_sample = sample;
@@ -115,6 +116,7 @@ private:
 
 	bool _is_sample_ready{};	///< true when new range finder data has fallen behind the fusion time horizon and is available to be fused
 	bool _is_sample_valid{};	///< true if range finder sample retrieved from buffer is valid
+	bool _is_regularly_sending_data{false}; ///< true if the interval between two samples is less than the maximum expected interval
 	uint64_t _time_last_valid_us{};	///< time the last range finder measurement was ready (uSec)
 
 	/*