[stable-2.9] Connect before reading the prompt? (#61797) (#61883)

* [stable-2.9] Connect before reading the prompt? (#61797)
(cherry picked from commit a365e77)

Co-authored-by: Nathaniel Case <ncase@redhat.com>

* Add changelog

* Update changelogs/fragments/61797-netcli-get_prompt.yaml

Co-Authored-By: Toshio Kuratomi <a.badger@gmail.com>

changelogs/fragments/61797-netcli-get_prompt.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "network_cli - ensure connection is established before returning the current prompt"

lib/ansible/plugins/connection/network_cli.py

@@ -346,6 +346,7 @@ class Connection(NetworkConnectionBase):
         name += "paramiko [%s]" % self._play_context.remote_addr
         return name
 
+    @ensure_connect
     def get_prompt(self):
         """Returns the current prompt from the device"""
         return self._matched_prompt