IOS XR cli tests move to network_cli (#34007)

* Update task definitions for network_cli

* Add connection to debug messages

* Specify connection for prepare task

* pc won't be around for connection=network_cli

* Assorted Python 3 fixes

* Give default port if ansible_ssh_port missing

* delegate -> connection

* Extend error regex

lib/ansible/module_utils/network/iosxr/iosxr.py

@@ -374,7 +374,7 @@ def get_config(module, config_filter=None, source='running'):
         if is_netconf(module):
             out = to_xml(conn.get_config(source=source, filter=config_filter))
 
-        cfg = to_bytes(out, errors='surrogate_then_replace').strip()
+        cfg = out.strip()
         _DEVICE_CONFIGS.update({key: cfg})
         return cfg