GPU alternative to raycasting scene for closest point queries on triangle meshes

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](https://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](https://www.open3d.org/docs/release/) and the [latest documentation](https://www.open3d.org/docs/latest/) (for `main` branch).

### Proposed new feature or change

The closest point queries on triangle meshes inside raycasting scene is currently a CPU only feature that uses Intel's Embree to perform its functions. I am looking for a GPU alternative to this feature that can perform closest point queries on triangle meshes using GPUs.

### References

Current implementation:
https://www.open3d.org/html/python_api/open3d.t.geometry.RaycastingScene.html

### Additional information

_No response_