### Related

* Required for #10521.

### What

This PR prevents static chunks _without components_ to enter the chunk
store.

> A static chunk without any components would be dangling from the
start.
> Our dangling logic retrieves relevant chunks by component descriptors,
> so it would never be able to find it. So we never add that chunk in
the
> first place.

Before this PR, the following code snippet would cause a `debug_assert!`
to be hit.

```rs
let chunk = Chunk::builder(entity_path.clone())
    .with_component_batches(RowId::new(), TimePoint::STATIC, [])
    .build()?;
let chunk = Arc::new(chunk);

let events = store.insert_chunk(&chunk)?;
```

Also, that `chunk` would never get free'd up by our logic for finding
dangling rows.

#### More considerations

Another option would be to emit both `Addition` and `Deletion` events in
the same `insert`. Finally a last question would be do we want the
chunk's entity path to show up in
`ChunkStore::static_chunk_ids_per_entity`.