feat: add `DataFrame` and `Series` `to_polars` #5699

Job	Run time
minimum_versions (3.8, ubuntu-latest)	1m 10s
not_so_old_versions (3.10, ubuntu-latest)	1m 23s
pretty_old_versions (3.8, ubuntu-latest)	1m 22s
nightlies (3.13, ubuntu-latest)	2m 31s
	6m 26s

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