Fix pylint warnings in testing config custom components (#119370)

...testing_config/custom_components/test/image_processing.py

tests/testing_config/custom_components/test/light.py

tests/testing_config/custom_components/test/lock.py

tests/testing_config/custom_components/test/remote.py

tests/testing_config/custom_components/test/switch.py

tests/testing_config/custom_components/test/weather.py

...esting_config/custom_components/test_embedded/__init__.py

.../testing_config/custom_components/test_embedded/switch.py

...g/custom_components/test_integration_platform/__init__.py

...testing_config/custom_components/test_package/__init__.py

...ustom_components/test_package_loaded_executor/__init__.py

...ig/custom_components/test_package_loaded_loop/__init__.py

...omponents/test_package_raises_cancelled_error/__init__.py

...t_package_raises_cancelled_error_config_entry/__init__.py

tests/testing_config/custom_components/test_standalone.py