test-lists: add checks for domain and URL category code inconsistencies

[hellais]

We need to add the lint-lists script, that is run prior to merging any PR to citizenlab/test-lists, checks to ensure we don't end up with inconsistent category codes in the lists.

The checks we need to implement are the following:

• The shortest representation of a URL is in the global list. If it's inside of the country list, we should prompt the user to migrate it there
• In the global list we don't have multiple variations (i.e. www.example.com and example.com) with different category codes of the same domain name

Some research into the prevalence of this problem is documented here: https://gist.github.com/hellais/fab319ae20b0ccca7b548a060ed66e14.

The steps to do this are 2:

1. Fixup (possibly manually by properly re-categorising them) the URLs affected by the abovementioned issues
2. Add checks to lint-lists that are run on the CI

This came up as part of: https://github.com/ooni/api/pull/300

[FedericoCeratto]

Related: a basic comparison tool https://jupyter.ooni.org/notebooks/notebooks/2023%20%5Bfederico%5D%20inconsistent%20test-list%20input%20url%20categories.ipynb