Change type annonation of 'tag' in plant, reap, call_and_reap, harvest, and HarvestSettings to Hashable to allow for Enums as tags.
Change type annonation of 'tag' in plant, reap, call_and_reap, harvest, and HarvestSettings to Hashable to allow for Enums as tags.

PiperOrigin-RevId: 463369648

jax-ml/oryx