Add hostname field to _parse_node_line (#3343)

Co-authored-by: Vladyslav Vildanov <117659936+vladvildanov@users.noreply.github.com>

redis/_parsers/helpers.py

@@ -445,9 +445,11 @@ def parse_cluster_info(response, **options):
 def _parse_node_line(line):
     line_items = line.split(" ")
     node_id, addr, flags, master_id, ping, pong, epoch, connected = line.split(" ")[:8]
-    addr = addr.split("@")[0]
+    ip = addr.split("@")[0]
+    hostname = addr.split("@")[1].split(",")[1] if "@" in addr and "," in addr else ""
     node_dict = {
         "node_id": node_id,
+        "hostname": hostname,
         "flags": flags,
         "master_id": master_id,
         "last_ping_sent": ping,
@@ -460,7 +462,7 @@ def _parse_node_line(line):
     if len(line_items) >= 9:
         slots, migrations = _parse_slots(line_items[8:])
         node_dict["slots"], node_dict["migrations"] = slots, migrations
-    return addr, node_dict
+    return ip, node_dict
 
 
 def _parse_slots(slot_ranges):