feat: Add a simple configurable notifications subscriber (#7331)

* feat: Add a simple configurable notifications subscriber that is configurable

* Proposal on awaiting all subscribers to run

* fix: Clean up wait subscribers util and notifications test

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Co-authored-by: adrien2p <adrien.deperetti@gmail.com>

packages/modules/api-key/src/types/index.ts

@@ -3,7 +3,7 @@ import { IEventBusModuleService, Logger } from "@medusajs/types"
 
 export type InitializeModuleInjectableDependencies = {
   logger?: Logger
-  eventBusService?: IEventBusModuleService
+  eventBusModuleService?: IEventBusModuleService
 }
 
 export type CreateApiKeyDTO = {