1. Make a call to assert_internally_consistent automatically when snapshoting the scheduler. There is no point in snapshoting something broken and expect the dumb humans to notice.
2. Replace every possible call to assert_internally_consistent by a snapshot of the scheduler. It takes as many lines and ensure we never change something without noticing in any tests ever.
3. Name every snapshots: it's easier to debug when something goes wrong and easier to review in general.
4. Stop skipping breakpoints, it's too easy to miss something. Now you must explicitely show which path is the scheduler supposed to use.
5. Add a timeout on the channel.recv, it eases the process of writing tests, now when something file you get a failure instead of a deadlock.
3080: Rename `originalFilters` into `originalFilter` on the cancelation and deletion routes r=irevoire a=Kerollmops
This PR fixes https://github.com/meilisearch/meilisearch/issues/3079.
Co-authored-by: Clément Renault <clement@meilisearch.com>
