ASIO: Example tests integration

components/asio/examples/tcp_echo_server/pytest.ini

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+[pytest]
+# only the files with prefix `pytest_` would be recognized as pytest test scripts.
+python_files = pytest_*.py
+
+addopts =
+  -s
+  --embedded-services esp,idf
+  -W ignore::_pytest.warning_types.PytestExperimentalApiWarning
+  --tb short
+
+# ignore DeprecationWarning
+filterwarnings =
+  ignore:Call to deprecated create function (.*)\(\):DeprecationWarning
+
+# log related
+log_cli = True
+log_cli_level = INFO
+log_cli_format = %(asctime)s %(levelname)s %(message)s
+log_cli_date_format = %Y-%m-%d %H:%M:%S
+
+log_file = test.log
+log_file_level = INFO
+log_file_format = %(asctime)s %(levelname)s %(message)s
+log_file_date_format = %Y-%m-%d %H:%M:%S