Drop support for Owner

[adrianlasota]

Owner is an optional field, but connection should be provided instead. We should remove owner with next breaking version.

Unit tests and all classes should be ready to just remove owner field from the interface and remove checks also (checks if one of [conn, owner] provided).

Interface class should look like that after changes:

class NetworkInterface(ABC):
    def __init__(
      self,
      *,
      connection: "Connection",
      interface_info: "InterfaceInfo",
      topology: Optional["NetworkInterfaceModel"] = None,
    )