Split basic units (#33510)

Split the one monolithic test for basic.py into several files

* Split test_basic.py along categories.
  This is preliminary to get a handle on things.  Eventually we may want
  to further split it so each file is only testing a single function.
* Cleanup unused imports from splitting test_basic.py
* Port atomic_move test to pytest.
  Working on getting rid of need to maintain procenv
* Split a test of symbolic_mode_to_octal to follow unittest best practices
  Each test should only invoke the function under test once
* Port test_argument_spec to pytest.
* Fix suboptions failure

test/units/module_utils/basic/test_log.py

@@ -6,8 +6,6 @@
 from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
-import sys
-import json
 import syslog
 from itertools import product
 
@@ -16,15 +14,6 @@ import pytest
 import ansible.module_utils.basic
 from ansible.module_utils.six import PY3
 
-try:
-    # Python 3.4+
-    from importlib import reload
-except ImportError:
-    # Python 2 has reload as a builtin
-
-    # Ignoring python3.0-3.3 (those have imp.reload if we decide we care)
-    pass
-
 
 class TestAnsibleModuleLogSmokeTest:
     DATA = [u'Text string', u'Toshio くらとみ non-ascii test']