roll up of fixes and updates for junos modules (#22543)

* removes cli functions
* adds comment and confirm to arguments
* implements zeroize argument
* fixes get_diff function in junos shared lib to return diff
* lots of minor bug fixes in junos_config
* minor syntax fixes in junos_netconf
* updates netconf integration tests

test/integration/targets/junos_config/tests/netconf/src_basic.yaml

@@ -17,8 +17,6 @@
 - assert:
     that:
       - "result.changed == true"
-# https://github.com/ansible/ansible-modules-core/issues/4807
-      - "result.updates is not defined"
 
 - name: check device with config
   junos_config:
@@ -29,7 +27,5 @@
 - assert:
     that:
       - "result.changed == false"
-# https://github.com/ansible/ansible-modules-core/issues/4807
-      - "result.updates is not defined"
 
 - debug: msg="END netconf/src_basic.yaml"