Enable v3 api for distributions
Ticket moved to GitHub: "pulp/pulp_ansible/707":https://github.com/pulp/pulp_ansible/issues/707
Currently, the ansible-galaxy client uses v2 to download collections from pulp_ansible. We have v3 views that we should expose. Note that there are some slight differences in Automation Hub's and pulp_ansible's formats though. I ran into this problem when working on #6132.