Polars: rechunk and write string views #150

Job	Run time
Regression Tests solo solutions (data.table)	9m 2s
Regression Tests solo solutions (collapse)	9m 59s
Regression Tests solo solutions (dplyr)	17m 40s
Regression Tests solo solutions (pandas)	7m 23s
Regression Tests solo solutions (pydatatable)	10m 39s
Regression Tests solo solutions (spark)	11m 4s
Regression Tests solo solutions (juliadf)	8m 9s
Regression Tests solo solutions (juliads)	11m 47s
Regression Tests solo solutions (polars)	5m 53s
Regression Tests solo solutions (R-arrow)	21m 49s
Regression Tests solo solutions (duckdb)	18m 53s
Regression Tests solo solutions (datafusion)	6m 38s
Regression Tests solo solutions (dask)	11m 15s
Regression Tests solo solutions (clickhouse)	23m 50s
Regression Tests all solutions	2h 23m 2s
	5h 17m 3s

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