Reenable @nomemtest on TSAN

Author: vstinner

Lib/test/support/__init__.py

@@ -1373,11 +1373,7 @@ def internal(*args, **kwargs):
         import_module('_testcapi')
         return test(*args, **kwargs)
 
-    use_tsan = check_sanitizer(thread=True)
-    reason ='not working with thread sanitizer (gh-157415)'
-    skip_if_tsan = unittest.skipIf(use_tsan, reason)
-
-    return cpython_only(skip_if_tsan(internal))
+    return cpython_only(internal)
 
 def bigaddrspacetest(f):
     """Decorator for tests that fill the address space."""