Check if FawltyDeps can be integrated as an optional tool for python check

[danigm]

There's an interesting tool for python packages that checks for undeclared and or unused dependencies https://github.com/tweag/FawltyDeps

It's a good idea to check if this is something interesting to integrate as a new check for packages that contains python modules or even as a new step in the CI so we don't forget about dependencies in this project.