to_unixtime does not support timestamps with a timezone

[Omega359]

Describe the bug

Somewhat related to #12892 but different. The following query fails in DF 45:

select to_unixtime(arrow_cast(to_timestamp('2023-01-14T01:01:30'), 'Timestamp(Second, Some("+05:30"))'));

The issue is in invoke_batch where it will match only DataType::Timestamp(_, None), not DataType::Timestamp(_, tz)

To Reproduce

Run sql.

Expected behavior

to_unixtime should work regardless of whether a tz was provided or not

Additional context

No response

[Omega359]

take