Deprecation of _jupyter_server_extension_paths in the server

When I use jupyterlab, I see the following warning:

```
[W 2024-01-11 13:04:09.700 ServerApp] A `_jupyter_server_extension_points` function was not found in notebook_shim. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
```