web: add missing typename to `viewerSettings` and `extensionsRegistry` queries in tests
Created by: valerybugakov
Context
Preparation to land https://github.com/sourcegraph/sourcegraph/pull/23351.
Changes
- Fixed GraphQL query response mocks for
viewerSettings
andextensionRegistry
queries. - Fixed incomplete mock for
Batch changes list
, which worked previously because another test was executed faster and overridden QraphQL responses mock.