CLUSTER NODES command does not return the node hostname

[dudizimber]

Version: 5.0.7

Platform: Python 3.11.4 on Mac OS 14.0

Description:
The CLUSTER NODES command returns a dictionary with the nodes' IP. It does not have a field for the hostname if a hostname was supplied to the node on initialization.

Proposal:
Add a "hostname" field to the _parse_node_line function response if the hostname, if there is one.