Remove temporary allocations when preprocessing a samples buffer (#14208)

* Remove allocations when smoothing samples buffer The number of dims per sample is always 1, ie. we are training and predicting only individual dimensions. * Do not try to stop anomaly detection threads twice. A separate function call has been added to stop anomaly detection threads. This commit removes the left over function calls that were made internally when a host was being created/destroyed. * Move samples instead of copying.