Unuse ActiveRecord::Base#cache_key (#8185)

* Unuse ActiveRecord::Base#cache_key

* Enable cache_versioning

* Call cache_collection

app/controllers/emojis_controller.rb

@@ -9,7 +9,7 @@ class EmojisController < ApplicationController
       format.json do
         skip_session!
 
-        render_cached_json(['activitypub', 'emoji', @emoji.cache_key], content_type: 'application/activity+json') do
+        render_cached_json(['activitypub', 'emoji', @emoji], content_type: 'application/activity+json') do
           ActiveModelSerializers::SerializableResource.new(@emoji, serializer: ActivityPub::EmojiSerializer, adapter: ActivityPub::Adapter)
         end
       end