fix import error for airflow-core log_groomer

[xchwan]

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There is no chart_utils under airflow-core/tests/unit/
The log_groomer file will broken due to import error.
fix it with relative path ( I tried absolute path but it under test folder).

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[potiuk]

The import is correct. The tests folders should be added to PYTHONPATH automatically. also the IDEs should nicely show them imported from the right place - but the problem was that our prek-hook had a bug and some of the folders created recently did not have properly namspaced __init__.py files.

Proper fix in #58211

[xchwan]

The import is correct. The tests folders should be added to PYTHONPATH automatically. also the IDEs should nicely show them imported from the right place - but the problem was that our prek-hook had a bug and some of the folders created recently did not have properly namspaced __init__.py files.

Proper fix in #58211

Thank you for your suggestion, but adding
__path__ = __import__("pkgutil").extend_path(__path__, __name__)
— if I’m not mistaken — would cause it to import helm_template_generator from helm-tests/tests/chart_utils instead of from airflow-core/tests/unit/charts.
Is that expected behavior?