chore: fix and migrate unit tests to vitest

apps/scandic-web/components/HotelReservation/SelectRate/getValidDates.test.ts

@@ -1,4 +1,4 @@
-import { beforeAll, describe, expect, it } from "@jest/globals"
+import { afterAll, beforeAll, describe, expect, it, vi } from "vitest"
 
 import { getValidFromDate, getValidToDate } from "./getValidDates"
 
@@ -6,11 +6,11 @@ const NOW = new Date("2020-10-01T00:00:00Z")
 
 describe("getValidFromDate", () => {
   beforeAll(() => {
-    jest.useFakeTimers({ now: NOW })
+    vi.useFakeTimers({ now: NOW })
   })
 
   afterAll(() => {
-    jest.useRealTimers()
+    vi.useRealTimers()
   })
 
   describe("getValidFromDate", () => {