Wikibase's api-testing CI job has WikibaseCirrusSearch enabled and includes OpenSearch, and some of the search-related e2e tests depend on this setup. There were a few instances (see e.g. T418086) where we forgot to add guard clauses to skip those tests for other extensions with an insufficient CI setup, which caused CI failures downstream. We should find a way to be notified of such problems.
Possible options:
* run api-testing nightly without OpenSearch as suggested in this comment: T418086#11717024
* run api-testing in our [existing secondary GH Actions CI](https://gerrit.wikimedia.org/g/mediawiki/extensions/Wikibase/+/ebc08435b5c5a2b45f61062e2422efbbb8de11f4/.github/workflows/secondaryCI.yml)
* ... something else?
This applies to the GraphQL `searchItems` field and the Wikibase REST search endpoints.