One-off migration for old types to new scoped types

1. Remove ~type::feature when ~type::maintenance exists - based on both labels being present after rename in https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/1003
2. Set security open, merged and closed MRs and open issues without a type::* label to ~type::maintenance
3. Set documentation open, merged closed MRs and open issues without a type::* label to ~type::maintenance

Questions

• Where should documentation be defaulted to?