pythongh-115142: Skip tests if _testinternalcapi is not available

Author: Eclips4

Lib/test/test_optimizer.py

@@ -1,6 +1,9 @@
-import _testinternalcapi
 import unittest
 import types
+from test.support import import_helper
+
+
+_testinternalcapi = import_helper.import_module("_testinternalcapi")
 
 
 class TestRareEventCounters(unittest.TestCase):