gh-155496: Use Argument Clinic for more functions in the time module

Lib/test/test_inspect/test_inspect.py

@@ -6378,15 +6378,10 @@ def test_thread_module_has_signatures(self):
         self._test_module_has_signatures(_thread, no_signature)
 
     def test_time_module_has_signatures(self):
-        no_signature = {
-            'asctime', 'ctime', 'get_clock_info', 'gmtime', 'localtime',
-            'strftime', 'strptime'
-        }
-        no_signature |= {name for name in
-            ['clock_getres', 'clock_settime', 'clock_settime_ns',
-             'pthread_getcpuclockid']
-            if hasattr(time, name)}
-        self._test_module_has_signatures(time, no_signature)
+        no_signature = {'strftime', 'strptime'}
+        unsupported_signature = {'asctime'}
+        self._test_module_has_signatures(time, no_signature,
+                                         unsupported_signature)
 
     def test_tokenize_module_has_signatures(self):
         import tokenize

Lib/test/test_unittest/testmock/testhelpers.py

@@ -1,8 +1,9 @@
 import inspect
-import time
 import types
 import unittest
 
+from test.support import import_helper
+
 from unittest.mock import (
     call, _Call, create_autospec, MagicMock,
     Mock, ANY, _CallList, patch, PropertyMock, _callable
@@ -929,8 +930,10 @@ def check_data_descriptor(mock_attr):
 
 
     def test_autospec_on_bound_builtin_function(self):
-        meth = types.MethodType(time.ctime, time.time())
-        self.assertIsInstance(meth(), str)
+        _testcapi = import_helper.import_module('_testcapi')
+        # This function is defined without a signature.
+        meth = types.MethodType(_testcapi.docstring_no_signature, object())
+        self.assertIsNone(meth())
         mocked = create_autospec(meth)
 
         # no signature, so no spec to check against