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.

lib/ansible/utils/display.py

@@ -35,7 +35,8 @@ from termios import TIOCGWINSZ
 from ansible import constants as C
 from ansible.errors import AnsibleError
 from ansible.utils.color import stringc
-from ansible.utils.unicode import to_bytes, to_unicode
+from ansible.module_utils._text import to_bytes, to_text
+
 
 try:
     # Python 2
@@ -45,7 +46,6 @@ except NameError:
     pass
 
 
-
 logger = None
 #TODO: make this a logging callback instead
 if C.DEFAULT_LOG_PATH:
@@ -105,7 +105,7 @@ class Display:
         """ Display a message to the user
 
         Note: msg *must* be a unicode string to prevent UnicodeError tracebacks.
-        """ 
+        """
 
         # FIXME: this needs to be implemented
         #msg = utils.sanitize_output(msg)
@@ -124,7 +124,7 @@ class Display:
                 # Convert back to text string on python3
                 # We first convert to a byte string so that we get rid of
                 # characters that are invalid in the user's locale
-                msg2 = to_unicode(msg2, self._output_encoding(stderr=stderr))
+                msg2 = to_text(msg2, self._output_encoding(stderr=stderr))
 
             if not stderr:
                 fileobj = sys.stdout
@@ -149,7 +149,7 @@ class Display:
                 # Convert back to text string on python3
                 # We first convert to a byte string so that we get rid of
                 # characters that are invalid in the user's locale
-                msg2 = to_unicode(msg2, self._output_encoding(stderr=stderr))
+                msg2 = to_text(msg2, self._output_encoding(stderr=stderr))
 
             if color == C.COLOR_ERROR:
                 logger.error(msg2)
@@ -279,7 +279,7 @@ class Display:
         if sys.version_info >= (3,):
             # Convert back into text on python3.  We do this double conversion
             # to get rid of characters that are illegal in the user's locale
-            prompt_string = to_unicode(prompt_string)
+            prompt_string = to_text(prompt_string)
 
         if private:
             return getpass.getpass(msg)
@@ -323,7 +323,7 @@ class Display:
             result = do_encrypt(result, encrypt, salt_size, salt)
 
         # handle utf-8 chars
-        result = to_unicode(result, errors='strict')
+        result = to_text(result, errors='surrogate_or_strict')
         return result
 
     @staticmethod