fix: ensure Auto DevOps is enabled for the common pipeline

The common pipeline is explicitly an Auto DevOps one. Auto DevOps tries to conditionally enable itself depending on which files are present. Notably if one has a pyproject.toml file but no setup.py file, it doesn't enable itself.

Auto DevOps assumes that a Python project will have at least one of requirements.txt or setup.py. Both of these files are replaced by pyproject.toml.