Move uses of to_bytes, to_text, to_native to use the module_utils version (#17423)

We couldn't copy to_unicode, to_bytes, to_str into module_utils because
of licensing.  So once created it we had two sets of functions that did
the same things but had different implementations.  To remedy that, this
change removes the ansible.utils.unicode versions of those functions.

test/units/mock/procenv.py

@@ -27,7 +27,8 @@ from contextlib import contextmanager
 from io import BytesIO, StringIO
 from ansible.compat.six import PY3
 from ansible.compat.tests import unittest
-from ansible.utils.unicode import to_bytes
+from ansible.module_utils._text import to_bytes
+
 
 @contextmanager
 def swap_stdin_and_argv(stdin_data='', argv_data=tuple()):
@@ -48,6 +49,7 @@ def swap_stdin_and_argv(stdin_data='', argv_data=tuple()):
     sys.stdin = real_stdin
     sys.argv = real_argv
 
+
 @contextmanager
 def swap_stdout():
     """
@@ -62,6 +64,7 @@ def swap_stdout():
     yield fake_stream
     sys.stdout = old_stdout
 
+
 class ModuleTestCase(unittest.TestCase):
     def setUp(self, module_args=None):
         if module_args is None: