I've tried to use/add the audit info to all events I could see/find.
This makes this PR necessarily huge, because we do store quite a few
events.
I realise it might not be complete yet, but tests
run green, and I think we now have a pattern to follow for other events.
We were sending `user.id` to the service, but if an admin token is used,
there is no `user.id.` Instead, there is
`user.internalAdminTokenUserId`. so we need to use the special method
`extractUserIdFromUser`.
This PR adds this implementation, and now the service correctly
retrieves the appropriate ID for admins.
Related to: https://github.com/Unleash/unleash/pull/5924
### What
Adds `createdByUserId` to all events exposed by unleash. In addition
this PR updates all tests and usages of the methods in this codebase to
include the required number.
