[FEA]: Use rapidsmpf's streaming read_parquet node in cudf-polars #20338
Description
Is your feature request related to a problem? Please describe.
rapidsai/rapidsmpf#574 is adding a dedicated streaming read_parquet node. Currently, #20161 requires a Python node to drive the pylibcudf read_parquet calls. We ought to be able to drop in the rapidsmpf node once it's availble.