Add publication options for packages with Phased-Update-Percentage

This weekend I came across https://utcc.utoronto.ca/~cks/space/blog/linux/Ubuntu2204ServerPhasedUpdates which goes into details about Ubuntu's phased updates system. Turns out support of it was added to apt in Ubuntu 22.04. That means is that if you have a fleet of machines they will end up with different version of the package. Naturally, I started wondering whether this affects katello and content views, and I think it does.

# curl -sS https://foreman.example.com/pulp/content/MyOrg/Library/custom/Ubuntu/focal-updates/dists/focal-updates/main/binary-amd64/Packages | grep -c 'Phased-Update-Percentage'
168

I don't have jammy synced, but the metadata seems to be there. I haven't actually tested that you get different versions of the package on different system on jammy, but I could.

The question is should pulp_deb so something about this? or not? Perhaps, as it seems to break the idea of content views.

It seems right now the only way to control this behaviour is via apt configuration options.

No file, test, or entry point is named. Start by tracing how pulp_deb publishes Ubuntu package metadata and how content views expose it, then compare that behavior with apt's Phased-Update-Percentage handling; define the desired publication options and a reproducible jammy case before implementation.