[experimental] onDragOver event looses target data props when specifying a collision detector

When importing and passing an alternative collision detector to useDroppable (tested with both 'directionBiased' and 'shapeIntersection') I'm loosing the target.data attribute in the onDragOver event. It's just an empty object. As soon as I remove the collisionDetector prop from useDroppable, the data is available again. Here's a quick mock-up example:

```
// Component
import { directionBiased } from '@dnd-kit/collision';
...

const { ref: dropRef } = useDroppable({
id: 'some-id',
accepts: ['menu_item'],
data: { thingOne: 'foo', thingTwo: 'bar' },
collisionDetector: directionBiased,
});

// Dnd event handler
const onDragOver = (e) => {
console.log('target data', e.operation.target.data);
}
```

Output with collisionDetector specified in useDroppable: target data {}
Output without collisionDetector specified in useDroppable: target data {thingOne: 'foo', thingTwo: 'bar'}