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/plugins/action/assemble.py

@@ -24,10 +24,10 @@ import tempfile
 import re
 
 from ansible.errors import AnsibleError
+from ansible.module_utils._text import to_native, to_text
 from ansible.plugins.action import ActionBase
 from ansible.utils.boolean import boolean
 from ansible.utils.hashing import checksum_s
-from ansible.utils.unicode import to_str, to_unicode
 
 
 class ActionModule(ActionBase):
@@ -42,7 +42,7 @@ class ActionModule(ActionBase):
         delimit_me = False
         add_newline = False
 
-        for f in (to_unicode(p, errors='strict') for p in sorted(os.listdir(src_path))):
+        for f in (to_text(p, errors='surrogate_or_strict') for p in sorted(os.listdir(src_path))):
             if compiled_regexp and not compiled_regexp.search(f):
                 continue
             fragment = u"%s/%s" % (src_path, f)
@@ -114,7 +114,7 @@ class ActionModule(ActionBase):
                 src = self._find_needle('files', src)
             except AnsibleError as e:
                 result['failed'] = True
-                result['msg'] = to_str(e)
+                result['msg'] = to_native(e)
                 return result
 
         if not os.path.isdir(src):