fixup! front: remove opTimingData from StdcmOpSchedule and simplify date management

Author: clarani

front/tests/utils/setup-utils.ts

@@ -177,8 +177,8 @@ export async function createDataForTests(): Promise<void> {
 
     const stdcmEnvironment = {
       infra_id: smallInfra.id,
-      search_window_begin: '2024-10-17T00:00:01+02:00',
-      search_window_end: '2024-10-18T23:59:59+02:00',
+      search_window_begin: new Date('2024-10-17T00:00:01+02:00').toISOString(),
+      search_window_end: new Date('2024-10-18T23:59:59+02:00').toISOString(),
       timetable_id: scenarioTrainSchedule.timetable_id,
     } as StdcmSearchEnvironment;