[TASK] Remove dummy files from ext:wizard_crpages and wizard_sortpages

* Remove dummy files
* Rename old class names to the new ones

Change-Id: I77ea8d6a48d10bc56031231a00999655cbecb487
Resolves: #48155
Related: #47756
Releases: 6.2
Reviewed-on: https://review.typo3.org/20765
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring