Move testHelpers directory up one level

src/repositories/shuttle/__tests__/UnoptimizedInMemoryShuttleRepositoryTests.test.ts

@@ -6,7 +6,7 @@ import {
   generateMockRoutes,
   generateMockShuttles,
   generateMockStops,
-} from "../../../../test/testHelpers/mockDataGenerators";
+} from "../../../../testHelpers/mockDataGenerators";
 
 // For repositories created in the future, reuse core testing
 // logic from here and differentiate setup (e.g. creating mocks)