end-to-end-testing: update test_ors to work with new master
End to end testing for ORS has been broken since the big slapos master update, this commit intends to make them work again. We start with a very simple test which just checks simbox can connect to ORS, later more tests will be added.
We don't create new instances anymore because it is currently not possible to add instance nodes with slapos python client. We therefore use existing services, but set all necessary parameters on them.
TODO in the next commits:
- start and stop the services on each test
- add a lock to prevent multiple E2E tests running on the same machine
- add more tests
Tests passes: https://erp5js.nexedi.net/#/test_result_module/20250207-D89E218A