Refactor and deduplicate HTTP requests code in listers

Numerous listers were using the same page_request method or equivalent in their implementation so prefer to deduplicate that code by adding an http_request method in base lister class: swh.lister.pattern.Lister.

That method simply wraps a call to requests.Session.request and logs some useful info for debugging and error reporting, also an HTTPError will be raised if a request ends up with an error.

All listers using that new method now benefit of requests retry when an HTTP error occurs thanks to the use of the http_retry decorator.

Depends on !310 (closed)

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Migrated from D8520 (view on Phabricator)