Simpler calls to *_translatable shared specs

Enable translations interface setting inside shared specs when needed.

Co-Authored-By: javierm <javim@elretirao.net>

spec/shared/features/new_translatable.rb

@@ -43,6 +43,7 @@ shared_examples "new_translatable" do |factory_name, path_name, input_fields, te
   end
 
   before do
+    Setting["feature.translation_interface"] = true
     login_as(user)
   end