Add option to pass storage config to polars lazy read

### Feature Request / Improvement

I was not able to use the `table.to_polars()` method because there is no option to include a storage_options param which is mentioned in the [polars docs](https://docs.pola.rs/api/python/dev/reference/api/polars.scan_iceberg.html).

Start at the implementation of table.to_polars() and trace how it invokes Polars' lazy read path. Check the Polars scan_iceberg documentation linked in the issue for the storage_options interface. Done means callers can provide storage_options through table.to_polars() and the option reaches the lazy read operation, with relevant tests updated or added.

Written by the indexing model from the issue text.