XWIKI-12253: Add a job to move/rename nested documents

* remove progressManager.endStep() calls that were not needed
* copy the WebPreferences (child) document when moving a document with deep=false in order to preserve the access rights at the new location
* use the EntityReferenceTree to ensure we iterate the document hierarchy in the right order (depth first) when deep=true
* Update the back-links and the relative links from the document content when performing a move/rename