Free event queues even for recursive finalizers

Free event queues even for recursive finalizers

For finalizers we can register yet another finalizer out from finalizer, and
iff finalizer will be in active_later_queue we can add finalizer to
activequeues, and we will have events in activequeues after event_base_free()
returns, which is not what we want (we even have an assertion for this).

A simple case is bufferevent with underlying (i.e. filters) in inactive queue.

Fixes: regress bufferevent/bufferevent_socket_filter_inactive