Use type attribute from visit instead of origin
As origin type attribute will be removed in favor of visit type attribute, remove any reference of it in swh-web codebase and use visit type instead.
As a consequence, the web api endpoint /api/1/origin/(origin_type)/url/(origin_url)/
has been removed.
I can add it back for backward compatibility if needed but considering it has been marked as deprecated since a couple of months, I do not think it is necessary.
Related T1891
Migrated from D2167 (view on Phabricator)