Support pow operation for list dtype

[bike-picket]

Description

Polars 1.1.0 brings improved list arithmetic support #19162. A huge thank you for this improvement!

Unfortunately, I noticed that pow operation is still not supported. For example, I execute this code:

value = pl.Series("value", [[1, 2, 3]])
exponent = pl.Series("exponent", [[2, 2, 3]])
result = (value ** exponent).to_list()
self.assertEqual([[1, 4, 27]], result)

which produces:

polars.exceptions.InvalidOperationError: `pow` operation not supported for dtype `list[i64]` as base