[rqlrewrite] sort possible types when turning is_instance_of into is
Helps get predictable output even with python -R. Related to #4959402.
option_group_changed('port', 'main', 'web')
option_group_changed('query-log-file', 'main', 'web')
option_group_changed('profile', 'main', 'web')
option_group_changed('max-post-length', 'main', 'web')