Limit try-except-star to Python 3.11 and above

Author: lieryan

ropetest/refactor/extracttest.py

@@ -1809,6 +1809,7 @@ def g():
         """)
         self.assertEqual(expected, refactored)
 
+    @testutils.only_for_versions_higher("3.11")
     def test_extract_method_and_try_except_star_block_1(self):
         code = dedent("""\
             def f():

ropetest/refactor/patchedasttest.py

@@ -1154,6 +1154,7 @@ def test_try_except_and_finally_node(self):
         expected_children = ["try", "", ":", "\n    ", "Pass", "\n", "ExceptHandler", "\n", "finally", "", ":", "\n    ", "Pass"]
         checker.check_children(node_to_test, expected_children)
 
+    @testutils.only_for_versions_higher("3.11")
     def test_try_except_group_node(self):
         source = dedent("""\
             try: