fix synchronize handling of encrypted hosts on delegation (#49460)

* Fix for #49363

* Replaced str() with to_text() as more python version safe

* Changed to comply to errors stragegy

lib/ansible/plugins/action/synchronize.py

@@ -49,7 +49,7 @@ class ActionModule(ActionBase):
         return path
 
     def _host_is_ipv6_address(self, host):
-        return ':' in host
+        return ':' in to_text(host, errors='surrogate_or_strict')
 
     def _format_rsync_rsh_target(self, host, path, user):
         ''' formats rsync rsh target, escaping ipv6 addresses if needed '''