I don't think it has ever worked in fact..
The server.evacuate() in novaclient returns not a Server() instance,
but a TupleWithMeta() object, that has no .to_dict() method [0]
used in _prep_server_detail() function.
[0] https://review.opendev.org/c/openstack/python-novaclient/+/276639
Change-Id: I22f9ac072eb1b0bfd1263a256e9bea4500c03290
Story: 2010204
Task: 45928