gh-122014: Account for abi_thread in test_sysconfig.test_user_similar (gh-122017)

Author: befeleme

Lib/test/test_sysconfig.py

@@ -417,8 +417,8 @@ def test_user_similar(self):
                 if name == 'platlib':
                     # Replace "/lib64/python3.11/site-packages" suffix
                     # with "/lib/python3.11/site-packages".
-                    py_version_short = sysconfig.get_python_version()
-                    suffix = f'python{py_version_short}/site-packages'
+                    py_version_abi = sysconfig._get_python_version_abi()
+                    suffix = f'python{py_version_abi}/site-packages'
                     expected = expected.replace(f'/{sys.platlibdir}/{suffix}',
                                                 f'/lib/{suffix}')
                 self.assertEqual(user_path, expected)