### Summary

ansible-doc contains deprecated calls to be removed for 2.17


### Issue Type

Feature Idea

### Component Name

`lib/ansible/cli/doc.py`
loader = DocCLI._prep_loader(plugin_type)
        
        plugin_docs = {}
        for plugin in names:
            doc = {}
            try:
                doc, plainexamples, returndocs, metadata = get_plugin_docs(plugin, plugin_type, loader, fragment_loader, (context.CLIARGS['verbosity'] > 0))
            except AnsiblePluginNotFound as e:
                display.warning(to_native(e))
                continue
            except Exception as e:
                if not fail_on_errors:
                    plugin_docs[plugin] = {'error': 'Missing documentation or could not parse documentation: %s' % to_native(e)}
                    continue
                display.vvv(traceback.format_exc())
                msg = "%s %s missing documentation (or could not parse documentation): %s\n" % (plugin_type, plugin, to_native(e))
                if fail_ok:
                    display.warning(msg)
                else:
                    raise AnsibleError(msg)
            if not doc:
                
                if not fail_on_errors: