feat: Ensure async workflow executions have access to shared container (#8157)

* feat: Ensure async workflow executions have access to shared container

* fix: Register workflow worker on application start

packages/core/medusa-test-utils/src/init-modules.ts

@@ -56,6 +56,8 @@ export async function initModules({
     injectedDependencies,
   })
 
+  await medusaApp.onApplicationStart()
+
   async function shutdown() {
     if (shouldDestroyConnectionAutomatically) {
       await medusaApp.onApplicationPrepareShutdown()