[ticket/11305] Extract hook finder from cache service.

Unlike most other things in cache service, hook finder does not need
a database connection.

PHPBB3-11305
[ticket/11305] Retrieve cache driver from container rather than cache service.

This only covers some of the call sites.

PHPBB3-11305
[ticket/11305] Create a normal container during final installation step.

The final step calls a bunch of code which expects a full phpBB
runtime environment. Also, by this step everything should be configured
and database schema set up.

Therefore, in the final step replace installer container with a normal
phpBB container.

PHPBB3-11305
[ticket/11305] Use phpbb_create_default_container.

PHPBB3-11305
[ticket/11305] Adjust comment.

PHPBB3-11305