tests: Add tox.ini and migrate to pytest
Related swh/infra/ci-cd/swh-jenkins-jobs#1247 (closed) Related swh-environment#1261 (closed)
Test Plan
tox
This fails, one test is in error
Migrated from D582 (view on Phabricator)
Staging instance, all changes can be removed at any time
Related swh/infra/ci-cd/swh-jenkins-jobs#1247 (closed) Related swh-environment#1261 (closed)
tox
This fails, one test is in error
Migrated from D582 (view on Phabricator)