Fix test failures if 'future' package is installed (#15005)

The python 'future' module provides a 'builtins' package
to emulate the py3 'builtins' modules. If installed, the
unit tests that reference builtins.__import__ fail because
the future 'builtins' is imported and it is missing __import__.

Use ansible.compat.six.moves.builtins instead of importing
'builtins' or __builtin__

Fixes #14996

test/units/plugins/action/test_action.py

@@ -22,15 +22,9 @@ __metaclass__ = type
 
 import os
 
-try:
-    import builtins
-except ImportError:
-    import __builtin__ as builtins
-
-
 from ansible import constants as C
 from ansible.compat.six import text_type
-from ansible.compat.six.moves import shlex_quote
+from ansible.compat.six.moves import shlex_quote, builtins
 from ansible.compat.tests import unittest
 from ansible.compat.tests.mock import patch, MagicMock, mock_open