Implement EZP-22995: Disable ezformtoken for low-level legacy fallbacks

A usual problem with 5.x is that users get ezformtoken exceptions because they have
implemented some form which does not sets the legacy form token (in addition to symfony token).

This improvement tries to reduce the risk of that happening by making sure all low level
runCallback calls used by kernel itself turns off form token checking.
Implement EZP-22995: Do not post reinitialize legcy kernel when not needed