FIX: Allow category moderators to move topics to their categories (#20896)

lib/guardian/category_guardian.rb

@@ -73,4 +73,13 @@ module CategoryGuardian
     @topic_featured_link_allowed_category_ids =
       Category.where(topic_featured_link_allowed: true).pluck(:id)
   end
+
+  def topics_need_approval?(category)
+    return false if is_admin?
+    return category.require_topic_approval? if !SiteSetting.enable_category_group_moderation
+    return category.require_topic_approval? if category.reviewable_by_group_id.nil?
+    if category.reviewable_by_group_id
+      !self.user.belonging_to_group_ids.include?(category.reviewable_by_group_id)
+    end
+  end
 end

lib/guardian/topic_guardian.rb

@@ -70,8 +70,7 @@ module TopicGuardian
           Category.find(category || SiteSetting.uncategorized_category_id)
         end
       )
-
-    is_staff? || (can_create_topic_on_category?(category) && !category.require_topic_approval?)
+    is_staff? || can_create_topic_on_category?(category) && !topics_need_approval?(category)
   end
 
   def can_create_post_on_topic?(topic)