feat(qa): take parameters from command arguments in python scripts

[hvanz]

The main changes are to allow setting the scripts' parameters by passing arguments instead of have them hardcoded in variables. The rest is just refactoring to give some structure to the code.

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PR checklist

• Tests written/updated
• Changelog entry added in .changelog (we use unclog to manage our changelog)
• Updated relevant documentation (docs/ or spec/) and code comments
• Title follows the Conventional Commits spec

[cason]

You can make the python scripts executable (chmod 700) then add to their first line:

#!/usr/bin/env python3

This tells the terminal to run the script using python3.