psycopg2 for django with postgresql now available in binary form

[dmsimard]

What is the issue ?

When installing psycopg2, it usually needs development libraries installed. I didn't know but it looks like there's a binary package available now:

  Error: pg_config executable not found.
  
  pg_config is required to build psycopg2 from source.  Please add the directory
  containing pg_config to the $PATH or specify the full executable path with the
  option:
  
      python setup.py build_ext --pg-config /path/to/pg_config build ...
  
  or with the pg_config option in 'setup.cfg'.
  
  If you prefer to avoid building psycopg2 from source, please install the PyPI
  'psycopg2-binary' package instead.

What should be happening ?

Maybe we should recommend using psycopg2-binary and leverage that in the ara collection: https://github.com/ansible-community/ara-collection/blob/ff0ef0c4e60b76d18c26a9d501f1b95496006f3d/roles/ara_api/tasks/database_engine/django.db.backends.postgresql.yaml#L45