Utilities for cleaning up 🧹

[orianac]

We could use a utility for cleaning up! Seems like right now it's being done manually but I can already see situations when we'll definitely want to have programmatic clean-up:
(1) testing (if we want a test to re-run because the code has changed, it won't currently if provided the same parameters since the cache will think it's done)
(2) to make development faster (maybe have an option to turn on the clean-up with different levels of clean-up)
(3) rechunker intermediate files (maybe this is already being done programmatically? I'm totally out of the loop on that part)