Fix "A copy of Gitlab::Metrics::Methods" have been removed error

Closes #44365

Author: stanhu

lib/gitlab/metrics/methods.rb

@@ -50,7 +50,7 @@ def synchronized_cache_fill(key)
         end
 
         def disabled_by_feature(options)
-          options.with_feature && !Feature.get(options.with_feature).enabled?
+          options.with_feature && !::Feature.get(options.with_feature).enabled?
         end
 
         def build_metric!(type, name, options)