[xDS interop] Fix the affinity test support range (#29972)

tools/run_tests/xds_k8s_test_driver/tests/affinity_test.py

@@ -45,10 +45,14 @@ class AffinityTest(xds_k8s_testcase.RegularXdsKubernetesTestCase):
 
     @staticmethod
     def is_supported(config: skips.TestConfig) -> bool:
-        if config.client_lang in (_Lang.CPP | _Lang.GO | _Lang.JAVA |
-                                  _Lang.PYTHON):
-            # Versions prior to v1.40.x don't support Affinity.
+        if config.client_lang in _Lang.CPP | _Lang.JAVA:
             return not config.version_lt('v1.40.x')
+        elif config.client_lang == _Lang.GO:
+            return not config.version_lt('v1.41.x')
+        elif config.client_lang == _Lang.PYTHON:
+            # TODO(https://github.com/grpc/grpc/issues/27430): supported after
+            #      the issue is fixed.
+            return False
         return True
 
     def test_affinity(self) -> None:  # pylint: disable=too-many-statements