[v1.12.0] Adapt tests following AI changes

Related to https://github.com/meilisearch/integration-guides/issues/307

### TODO

Adapt tests (`Pre-release`) working on this branch: https://github.com/meilisearch/meilisearch-ruby/pull/575

⚠️ Make PRs pointing to `bump-meilisearch-v1.12.0` and NOT `main`. Please do 1 PR for all of these changes, and not several.