Ensure config.active_record.time_zone_aware_types is always set

While the option on `ActiveRecord::Base` is always around, we need to
explicitly set it on the config object. Otherwise the recommended
configuration change results in an error.

Fixes rails#22839

Author: sgrif

activerecord/lib/active_record/railtie.rb

@@ -71,6 +71,7 @@ class Railtie < Rails::Railtie # :nodoc:
       ActiveSupport.on_load(:active_record) do
         self.time_zone_aware_attributes = true
         self.default_timezone = :utc
+        self.time_zone_aware_types = ActiveRecord::Base.time_zone_aware_types
       end
     end