TryGoToDefinition accepted a containingTypeSymbol which was used
to do some specific logic to see if third-party navigation is allowed.
Move that logic to the AbstractGoToDefinitionService and just pass the
result of the logic through.

Pass CancellationTokens through from Go To Definition. Pass cancellation tokens through type and namespace generation,
since those operations can do large amounts of work.

Pass CancellationTokens through from Go To Definition. Pass cancellation tokens through type and namespace generation,
since those operations can do large amounts of work.