This commit fixes an issue where when some actions were done
(deleting/recovering post, moving posts) we updated the
topic_users.bookmarked column to the wrong value. This was happening
because the SyncTopicUserBookmarked job was not taking into account
Topic level bookmarks, so if there was a Topic bookmark and no
Post bookmarks for a user in the topic, they would have
topic_users.bookmarked set to false, which meant the bookmark would
no longer show in the /bookmarks list.
To reproduce before the fix:
* Bookmark a topic and don’t bookmark any posts within
* Delete or recover any post in the topic
c.f. https://meta.discourse.org/t/disappearing-bookmarks-and-expected-behavior-of-bookmarks/264670/36
a86833fe91