Fix iosxr netconf integration test (#57882)

* Modify testcase to work with Zuul CI enviornment

test/integration/targets/netconf_config/tests/iosxr/basic.yaml

@@ -5,6 +5,7 @@
   netconf_config:
     backup: yes
   register: result
+  connection: netconf
 
 - assert:
     that:

test/integration/targets/netconf_get/tests/iosxr/basic.yaml

@@ -114,7 +114,7 @@
 
 - assert:
     that:
-      - "{{ result['output']['rpc-reply']['data']['aaa'] is defined}}"
+      - "{{ result['output']['data']['aaa'] is defined}}"
 
 - name: get configuration data in xml pretty format
   netconf_get: