Add a information about roles to the `tt rs status` output

[askalt]

Origin

Need to think about the way to output both "sharding roles" and "roles" for cluster config app some acceptable way.

2sp is here because there are existing tests that rely on the current status format. https://github.com/tarantool/tt/blob/590b4cd95f940642770eb3cf6f9c9a97249c8a20/test/integration/replicaset/replicaset_helpers.py#L58-L105