This adds the convenience functions withDefaults and
withoutDefaults which simply wrap the provided argument in a list
either with or without the default poetry overrides.
Tests have also been adapted to make use of `withDefaults` where
appropriate.
Drp `poetrylock` and `pyproject` mandatory arguments
without default values and drops `src` from `mkPoetryPyhon`.
Fix test invocations with invalid arguments.
This adds the following new tests:
- trivial: minimaltest case
- override-support: verify overriding
- common-pkgs-1/2: verify commonly downloaded pypi pkgs can be built
Also adds some overrides as needed by some of the
tested packages.
