IOS-XR NetConf and Cliconf plugin work (#33332)

*  - Netconf plugin addition for iosxr
 - Utilities refactoring to support netconf and cliconf
 - iosx_banner refactoring for netconf and cliconf
 - Integration testcases changes to accomodate above changes

* Fix sanity failures, shippable errors and review comments

* fix pep8 issue

* changes run_command method to send specific command args

* - Review comment fixes
- iosxr_command changes to remove ComplexDict based command_spec

* - Move namespaces removal method from utils to netconf plugin

* Minor refactoring in utils and change in deprecation message

* rewrite build_xml logic and import changes for new utils dir structure

* - Review comment changes and minor changes to documentation

* * refactor common code and docs updates

test/integration/targets/iosxr_command/tests/cli/invalid.yaml

@@ -3,7 +3,7 @@
 
 - name: run invalid command
   iosxr_command:
-    commands: ['show foo']
+    commands: [{command: 'show foo', prompt: 'fooprompt', answer: 'yes'}]
   register: result
   ignore_errors: yes
 
@@ -15,7 +15,7 @@
   iosxr_command:
     commands:
       - show version
-      - show foo
+      - [{command: 'show foo', prompt: 'fooprompt', answer: 'yes'}]
   register: result
   ignore_errors: yes