[laws] also schedule Fibers to their priorityQueues from anywhere

First of all I think it makes sense for laws to also look at affinities of Fibers
scheduled to the AnywhereQueue.
But the actual reason is that IO completions scheduled from the completer
could be dispatched from the priorityQueue before they are found in the
expensive AnywhereQueue.

But this comes with the cost of a vcall for scheduleFromAnywhere.