Fix EZP-23459: eZContentObjectTreeNodeOperations::move missing features

Ensure that it checks whether view caching is enabled before clearing it. (Edit: Never mind, is already done)
Ensure that CacheThreshold is respected, if exceeded clear all cache.

https://jira.ez.no/browse/EZP-23459

(Part 3: Defer to script monitor will be moved to a separate issue)