FIX: Ignore posts needing approval when calculating reviewable counts. (#13464)

In #12841, we started setting the ReviewableQueuedPost's target and topic after approving it instead of storing them in the payload. As a result, the reviewable_counts query started to include queued posts.

When a category is set to require approval, every post has an associated reviewable. Pointing that each post has an associated queued post is not necessary in this case, so I added a WHERE clause to skip them.

lib/topic_view.rb

@@ -509,7 +509,8 @@ class TopicView
           reviewable_scores s ON reviewable_id = r.id
         WHERE
           r.target_id IN (:post_ids) AND
-          r.target_type = 'Post'
+          r.target_type = 'Post' AND
+          COALESCE(s.reason, '') != 'category'
         GROUP BY
           target_id
       SQL