Refactor do0d, do1d, do2d to make use of dond internally

As we make it possible to capture more complex data into qcodes datasets it makes sense to minimize the amount of code defining datasets. do0d, do1d and do2d does nothing that dond cannot do but are for historic reasons implemented independently. It makes sense to refactor this code to call dond directly so less code needs to be maintained

Locate the implementations and entry points for do0d, do1d, do2d, and dond, then compare how the existing helpers define datasets. Refactor the three helpers to call dond directly while preserving their current behavior, and verify the existing data-acquisition tests or examples covering these helpers.

Written by the indexing model from the issue text.