[FEATURE] Add hook to post process preview url

Add a hook to post process the preview url in
`BackendUtility->viewOnClick()'.

Change-Id: Ib5ae283276f65de79466333c685df107ce10dbe7
Resolves: #54887
Releases: master
Reviewed-on: https://review.typo3.org/45918


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>