actionpack: add test for url_helpers include

Author: aruma256

gems/actionpack/7.2/_test/test.rb

@@ -7,3 +7,7 @@ class BarController < ActionController::Base
 end
 
 ActionController::Base.new.render_to_string(template: 'foo', locals: { bar: 'baz' })
+
+class FooService
+  include ActionDispatch::Routing::RouteSet.new.url_helpers
+end

gems/actionpack/7.2/_test/test.rbs

@@ -3,3 +3,6 @@ end
 
 class BarController < ActionController::Base
 end
+
+class FooService
+end