Merge branch '20473-rails-queue-duration' into 'master'

Gitlab::Metrics.current_transaction needs to be public for RailsQueueDuration

See merge request !5592

CHANGELOG

@@ -30,6 +30,7 @@ v 8.11.0 (unreleased)
   - Make branches sortable without push permission !5462 (winniehell)
   - Check for Ci::Build artifacts at database level on pipeline partial
   - Make "New issue" button in Issue page less obtrusive !5457 (winniehell)
+  - Gitlab::Metrics.current_transaction needs to be public for RailsQueueDuration
   - Add GitLab Workhorse version to admin dashboard (Katarzyna Kobierska Ula Budziszewska)
   - Add the `sprockets-es6` gem
   - Multiple trigger variables show in separate lines (Katarzyna Kobierska Ula Budziszewska)

lib/gitlab/metrics.rb

@@ -141,10 +141,9 @@ module Gitlab
       end
     end
 
+    # Allow access from other metrics related middlewares
     def self.current_transaction
       Transaction.current
     end
-
-    private_class_method :current_transaction
   end
 end