Remove all usage of ansible.module_utils.six from main branch (#10888)

* Get rid of all six.moves imports.

* Get rid of iteritems.

* Get rid of *_type(s) aliases.

* Replace StringIO import.

* Get rid of PY2/PY3 constants.

* Get rid of raise_from.

* Get rid of python_2_unicode_compatible.

* Clean up global six imports.

* Remove all usage of ansible.module_utils.six.

* Linting.

* Fix xml module.

* Docs adjustments.

plugins/modules/imc_rest.py

@@ -266,6 +266,7 @@ output:
 
 import os
 import traceback
+from itertools import zip_longest
 
 LXML_ETREE_IMP_ERR = None
 try:
@@ -284,7 +285,6 @@ except ImportError:
     HAS_XMLJSON_COBRA = False
 
 from ansible.module_utils.basic import AnsibleModule, missing_required_lib
-from ansible.module_utils.six.moves import zip_longest
 from ansible.module_utils.urls import fetch_url
 
 from ansible_collections.community.general.plugins.module_utils.datetime import (