pyoxidizer: fix building with PEP 517 support
Don't run the pyoxidizer tests on this, because a few fail! But that's independent of getting the builds working.
All legacy (hg-git based) Projects have been automatically migrated to native with the upgrade of 2025-01-23
Don't run the pyoxidizer tests on this, because a few fail! But that's independent of getting the builds working.