Support OpenDev (opendev.org) repositories

[lcarva]

Summary

Add support for resolving and verifying packages hosted on OpenDev (opendev.org).

Packages

Package	Version	Repository
python-jenkins	1.8.3	https://opendev.org/jjb/python-jenkins
stevedore	5.7.0	https://opendev.org/openstack/stevedore

Notes

OpenDev runs Gitea, so its API should be compatible with the Gitea API. Tag listing and archive download URLs likely follow the standard Gitea pattern (e.g., https://opendev.org/{owner}/{repo}/archive/{tag}.tar.gz).