This change sets ansible_python_interpreter to /usr/bin/python3 when including
01_core.yml. It avoids permission issues when Ansible runs module-based tasks
as the non-privileged AUR builder user, since the virtualenv Python binary is
not executable for that user.
Context and discussion:
https://chatgpt.com/share/6930230d-d7e0-800f-a5dc-67d7f75020e5