False triggering `effector/no-unnecessary-combination` on combine with fn

Plusing should ignore combine operator in source for a sample if it has fn specified 

```ts
sample({
clock: $desks,
source: combine({ desks: $desks, id: $id }, ({ desks, id }) => findActiveDesk(desks, id)),
filter: desk => isNullable(desk),
target: noActiveDeskFound
});
```