protocols: Add more control over gathering additional information

[Douile]

Adds GatherToggle which allows choosing the behaviour for how the query handles fetching additional information. The choices are:

• DontGather - Don't attempt to fetch information
• AttemptGather - Try to fetch the information but ignore errors
• Required - Try to fetch information and fail if it errors

A handy macro was also added to utils to dispatch additional queries based on a GatherToggle value, this could also be a method on GatherToggle but I thought that was less ergonomic.

[cainthebest]

Other than the enum mentioned, LGTM