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Move the query implementations (polars and duckdb) from https://github.com/GregoryKimball/cudf-performance/tree/main/20250606_tpcds/queries to cudf-polars in the experimental benchmarks

Instructions for generating the data will be upstreamed to polars-benchmark soon. After which the queries will be too.

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CC @GregoryKimball