fix: mock @calcom/lib/i18n in EventManager.test.ts to prevent vitest worker shutdown flake (#28630)

* fix: mock @calcom/lib/i18n in EventManager.test.ts to prevent vitest worker shutdown flake

TranslationService transitively imports @calcom/lib/i18n which triggers slow
module resolution via vite's RPC. When the vitest worker shuts down before it
completes, it causes 'Closing rpc while fetch was pending' errors.

Mocking the module prevents the actual module resolution during test loading.

Co-Authored-By: romitgabani1 <romitgabani1.work@gmail.com>

* chore: remove explanatory comments per review feedback

Co-Authored-By: romitgabani1 <romitgabani1.work@gmail.com>

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

packages/features/bookings/lib/EventManager.test.ts

@@ -18,6 +18,11 @@ vi.mock("@calcom/features/watchlist/operations/check-if-users-are-blocked.contro
 vi.mock("@calcom/features/watchlist/lib/telemetry", () => ({
   sentrySpan: vi.fn(),
 }));
+vi.mock("@calcom/lib/i18n", () => ({
+  locales: ["en"],
+  localeOptions: [{ value: "en", label: "English" }],
+  defaultLocaleOption: { value: "en", label: "English" },
+}));
 
 import process from "node:process";
 import { CredentialRepository } from "@calcom/features/credentials/repositories/CredentialRepository";