fix: integration tests modules 2 (#6599)

Currently, if the v2 flag is not enabled it can lead to issues if the modules are part of the medusa config as they will get loaded anyway leading to issues if the migrations did not ran

integration-tests/modules/__tests__/modules/load-standalone.ts

@@ -3,6 +3,7 @@ import { medusaIntegrationTestRunner } from "medusa-test-utils"
 jest.setTimeout(30000)
 
 medusaIntegrationTestRunner({
+  force_modules_migration: true,
   testSuite: ({ dbConnection }) => {
     describe("Standalone Modules", () => {
       beforeAll(async () => {