EZP-22051: Use SecurityContext to check access on content/versionview

This is now possible thanks to #656 ([EZP-22045](https://jira.ez.no/browse/EZP-22045))
EZP-22051: Fix form token issue due to regeneration of session ids

Avoid session to regenerate while manually injecting user in legacy using eZUser::NO_SESSION_REGENERATE flag.
This injection of user has been introduced in #656 ([EZP-22045](https://jira.ez.no/browse/EZP-22045))