cgit: rewrite the CGit lister
Simplify the code:
- do only inherit from ListerBase
- implement HTTP queries directly using requests
- get rid of convoluted code
Make the origin_url gathered from the git repo's "project" page instead of building it from the 'url_prefix' hack. Now, the lister WILL make substancially more requests, since it will make one request per listed git repo, but the provided origin_url should be pretty reliable now.
When several url are provided as clonable URLs, choose the http/https one first, otherwise, choose the first one of the list.
Add proper tests for the cgit lister.
Also, get rid of the 'time_updated' column in the model.
Depends on !86 (closed)
Migrated from D1929 (view on Phabricator)