This adds a separate owners file that can be imported in projects with
FSF copyright assignment, so that only people with copyright paperwork
on file can commit (or verify commits before approving).
Change-Id: Ifbe07792572b9d6bf5f7d47c41135892bddea46b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11108
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>
