Migrate swh-web tests to pure pytest
As all other swh components implement their test in pure pytest, we should do the same in swh-web and remove the use of unittest for consistency.
Migrated from T2062 (view on Phabricator)
As all other swh components implement their test in pure pytest, we should do the same in swh-web and remove the use of unittest for consistency.
Migrated from T2062 (view on Phabricator)