[ticket/12150] Add options to acp

PHPBB3-12150
[ticket/12150] Add prune columns to schema files and migration file

PHPBB3-12150
[ticket/12150] Add file and caller for pruning shadow topics

PHPBB3-12150
[ticket/12150] Add missing prune settings variables in acp_forums

PHPBB3-12150
[ticket/12150] Add missing space to query for shadow topics

PHPBB3-12150
[ticket/12150] Add functional tests for pruning shadow topics

PHPBB3-12150
[ticket/12150] Use shorter column names for prune settings

All columns were renamed from having prune_shadow_topics as namebase to just
prune_shadow.
A missing column was also added to the migration file's remove_schema() method.

PHPBB3-12150
[ticket/12150] Use log service instead of add_log() function

PHPBB3-12150
Merge branch 'develop-ascraeus' of https://github.com/phpbb/phpbb into ticket/12150
[ticket/12150] Update schema files for prune shadow topics

PHPBB3-12150
[ticket/12150] Remove 'after' for columns from migrations file

PHPBB3-12150
[ticket/12150] Use correct license URL in prune shadow migrations file

PHPBB3-12150
Merge remote-tracking branch 'Marc/ticket/12150' into develop-ascraeus

* Marc/ticket/12150:
  [ticket/12150] Use correct license URL in prune shadow migrations file
  [ticket/12150] Remove 'after' for columns from migrations file
  [ticket/12150] Update schema files for prune shadow topics
  [ticket/12150] Use log service instead of add_log() function
  [ticket/12150] Use shorter column names for prune settings
  [ticket/12150] Add functional tests for pruning shadow topics
  [ticket/12150] Add missing space to query for shadow topics
  [ticket/12150] Add missing prune settings variables in acp_forums
  [ticket/12150] Add file and caller for pruning shadow topics
  [ticket/12150] Add prune columns to schema files and migration file
  [ticket/12150] Add options to acp