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The LiteralColumn expression in cudf_polars currently holds a pyarrow.Array (by converting a polars.Series) as it value. In order to support removing pyarrow as a dependency in cudf_polars, #18534, we should ideally just hold the polars.Series value and convert it to a pylibcudf.Column when needed

In order to do this conversion, pylibcudf.Column will need to accept objects exposing __arrow_c_stream__ following from #18402,