Update Ponos URLs in API mocks

Erwan Rouchet
2023-02-06T14:18:21Z

[This CI job](https://gitlab.com/teklia/arkindex/cli/-/jobs/3718857637) has failed because the API mocks in unit tests are mocking `/ponos/v1/` URLs, which have been changed to `/api/v1` in backend#1430.