Function polars::export::arrow::compute::cast::timestamp_to_timestamp

pub fn timestamp_to_timestamp(
    from: &PrimitiveArray<i64>, 
    from_unit: TimeUnit, 
    to_unit: TimeUnit, 
    tz: &Option<String>
) -> PrimitiveArray<i64>

This is supported on crate feature compute_cast only.

Conversion of timestamp