code: def teardown(self):
      chaos_res = CusResource(
          kind=self._chaos_config["kind"],
          group=constants.CHAOS_GROUP,
          version=constants.CHAOS_VERSION,
          namespace=constants.CHAOS_NAMESPACE,
      )
      meta_name = self._chaos_config.get("metadata", None).get(
          "name", None
      )
      chaos_res.delete(meta_name, raise_ex=False)
      sleep(2)
      log.info(f"Alive threads: {threading.enumerate()}")
  
imports: import threading
  import pytest
  import time
  import random
  from pathlib import Path
  from time import sleep
  from pymilvus import connections
  from chaos.checker import InsertFlushChecker, SearchChecker, QueryChecker, Op
  from common.cus_resource_opts import CustomResourceOperations
  from common.milvus_sys import MilvusSys
  from utils.util_log import test_log
  from utils.util_k8s import wait_pods_ready, get_pod_ip_name_pairs, get_milvus_instance_name
  from chaos import chaos_commons
  from common.common_type import CaseLabel
  from common import common_func
  from chaos import constants
  from delayed_assert import expect, assert_expectations
label_desc: Use image node_id 3 for calling the TestChaos obj's underlying member method code with example usage: obj.teardown() without return types