FEATURE: enable tagging by default (#13175)

Over the years we have found that a few communities never discovered tags.

Instead of having them default off we now have them default on, ensuring
that everyone finds out about them.

Co-authored-by: Dan Ungureanu <dan@ungureanu.me>

spec/lib/search_spec.rb

@@ -106,6 +106,7 @@ describe Search do
 
     it "includes custom tables" do
       begin
+        SiteSetting.tagging_enabled = false
         expect(Search.execute("test").posts[0].topic.association(:category).loaded?).to be true
         expect(Search.execute("test").posts[0].topic.association(:tags).loaded?).to be false