asio: fix asio test code to start the test after ip address received from common example code

Previously set to wait until IP address got from tcpip_adapter, but since common example connect code blocks until both IP4 and IPv6 address received it could happen that test code might have started connection to the ASIO counter-part while ESP32 still waiting for IPv6 address


* Original commit: espressif/esp-idf@208feef3c9

examples/protocols/asio/chat_client/asio_chat_client_test.py

@@ -82,7 +82,7 @@ def test_examples_protocol_asio_chat_client(env, extra_data):
     thread1.start()
     # 2. start the dut test and wait till client gets IP address
     dut1.start_app()
-    dut1.expect(re.compile(r" sta ip: ([^,]+),"), timeout=30)
+    dut1.expect(re.compile(r" IPv4 address: ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)"), timeout=30)
     # 3. send host's IP to the client i.e. the `dut1`
     dut1.write(host_ip)
     # 4. client `dut1` should receive a message