Add Vacasa sites to rws config

[jagaleanoob]

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[cfredric]

Not reviewing this PR this week since it's marked as a draft. If you'd like this to be merged, please resolve the existing issues and mark it as ready for review (or tell us you're ready for review).

[github-actions]

It appears you have failed some tests. Here are your results:
The provided service site is not an eTLD+1: https://accounts.vacasa.io
Experienced an error when trying to access https://vacasa.com/.well-known/related-website-set.json; error was: HTTP Error 404: Not Found
Experienced an error when trying to access https://accounts.vacasa.io/.well-known/related-website-set.json; error was: HTTP Error 404: Not Found
The service site https://accounts.vacasa.io does not have an X-Robots-Tag in its header