Keep declaration of Doctrine Event Listeners

[relthyg]

Doctrine Lifecycle Subscribers have been abandoned in Symfony 6.4, which is why we can't use this technique anymore. Instead we revert some changes from fe96e075 and declare Lifecycle Listeners.

[mpdude]

When then should switch back thoroughly, clean up the unused method and avoid potentially wiring it twice (as a listener and subscriber) – see c8fc79b2a47badbdb586b2a831c3ee89fc80db1f.