The ScalingTracking of autoscaler is wrong

The ScalingTracking of autoscaler is wrong, it's always greater than AutoScalerOptions#STABILIZATION_INTERVAL.

Reason:

When flink job isStabilizing, ScalingMetricCollector#updateMetrics will return a empty metric history. In the JobAutoScalerImpl#runScalingLogic method, if `collectedMetrics.getMetricHistory().isEmpty()` , we don't update the ScalingTracking.

The default value of AutoScalerOptions#STABILIZATION_INTERVAL is 5 min, so the restartTime is always greater than 5 min.

However, it's quick when we use rescale api.