migration: Canonicalize historic queries (!39154) · Merge requests · Administrator / sourcegraph · GitLab

Administrator requested to merge ef/canonicalize-query into main Jul 20, 2022

Created by: efritz

Extracted from #36319. This PR:

Adds canonicalizeQuery which strips out some metadata added and removed in historic versions of our migration definition journey.
Drive-bys:
- Adds NewDefinitions to enable (later) external construction
- Adds more information to an error message

Test plan

Additional unit tests in this PR.