Fix NonMesh draw command item queries

[brianreavis]

This fixes NonMesh draw commands not receiving render-world entities since

• Retain bins from frame to frame. #17698

This unbreaks item queries for queued non-mesh entities:

struct MyDrawCommand {
    type ItemQuery = Read<DynamicUniformIndex<SomeUniform>>;
    // ...
}

Solution

Pass render entity to NonMesh draw commands instead of Entity::PLACEHOLDER. This PR also introduces sorting of the NonMesh bin keys like other types, which I assume is the intended behavior. @pcwalton

Testing

• Tested on a local project that extensively uses NonMesh items.