Enable DiscussionTools' beta features on almost all remaining projects
Leaving all of the redundant values for now: the Phabricator task
references might still be useful to keep track of which communities
requested it to be enabled earlier.
On a few wikis, the reply tool is already enabled for everyone (not
part of a beta feature), that is not changed.
German Wikipedia (dewiki) is not included: we're planning to discuss
it with that community separately (T275254).