FinalRule: Remove exceptions for Doctrine entities?

[ThomasLandauer]

With the advent of PHP's native lazy objects in Doctrine ORM 3.4 doctrine/orm#11853, I think it's now possible to add final to all entities, right?

[ruudk]

Yes, I just ran some testing. With final entities and enable_native_lazy_objects disabled I get errors about it being final. When I enable enable_native_lazy_objects it all works fine. So if you ask me, there is no need to prevent final entities anymore.

[localheinz]

Note to self, also see phpstan/phpstan-doctrine#667.

[ThomasLandauer]

This is a nice example where a "rule explanation" would probably make sense - see #945