Rewrite delete logic to fix transformed partition types

[xieandrew]

Fixes #78 by reading the manifest for transformed partition names instead of column names. Now to delete a partition with a partition by day, append _day to the name and pass only the date value. (e.g. --partition '[{"name": "tpep_pickup_datetime_day", "values": ["2024-12-31"]}]').

WIP, more testing required.