Adding the website resource and finding

[lm-sec]

This PR is the first of multiple PRs

With this new resource and finding, it is possible to represent websites in the database.

When a PortServiceFinding with a serviceName of http or https is emitted by a job, the jobs manager recognises that this is a website and emits a WebsiteFinding for every combination of a host's linked domains.

It is done this way because a port scan does not have the domain information with it, and anyway, any domain that resolves to a host could have a different website for the same port through the concept of virtual hosts.

A website is the combination of a domain (can be empty), a host, a port and a path (defaults to /). The reason behind the path is that several websites could be routed by a proxy, resulting in a different website at a different path.

This PR does not include any interface, but it will eventually get its own view. Cleanup is also lacking a little bit.

You can ignore the "new" e2e tests here. They are a copy paste from ports and will be fully changed in the next PR