Fix build variables policy after renaming methods

lib/gitlab/ci/build/policy/variables.rb

@@ -8,7 +8,7 @@ module Gitlab
           end
 
           def satisfied_by?(pipeline, seed)
-            variables = seed.to_resource.variables_hash
+            variables = seed.to_resource.scoped_variables_hash
 
             statements = @expressions.map do |statement|
               ::Gitlab::Ci::Pipeline::Expression::Statement