[stable-2.13] Prefer unittest.mock over mock. (#77886)

(cherry picked from commit 2595b42aca)

Co-authored-by: Matt Clay <matt@mystile.com>

test/units/module_utils/basic/test_get_module_path.py

@@ -9,7 +9,7 @@ __metaclass__ = type
 
 from units.mock.procenv import ModuleTestCase
 
-from mock import patch
+from units.compat.mock import patch
 from ansible.module_utils.six.moves import builtins
 
 realimport = builtins.__import__