[2.7] ios check_rc: Default to sending text of exception, not the whole exception (#47300)

* Default to sending text of exception, not the whole exception
(cherry picked from commit 6a866a5)

Co-authored-by: Nathaniel Case <this.is@nathanielca.se>

changelogs/fragments/47300-ios-check_rc.yaml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - Fix issue getting output from failed ios commands when ``check_rc=False``

lib/ansible/plugins/cliconf/ios.py

@@ -291,7 +291,7 @@ class Cliconf(CliconfBase):
             except AnsibleConnectionFailure as e:
                 if check_rc:
                     raise
-                out = getattr(e, 'err', e)
+                out = getattr(e, 'err', to_text(e))
 
             responses.append(out)