chore: group & release events for local eventbus (#7649)

* chore: stage & release events for local eventbus

* chore: address review

* chore: mock emitter correctly

packages/core/utils/src/event-bus/index.ts

@@ -24,6 +24,16 @@ export abstract class AbstractEventBusModuleService
   abstract emit<T>(data: EventBusTypes.EmitData<T>[]): Promise<void>
   abstract emit<T>(data: EventBusTypes.Message<T>[]): Promise<void>
 
+  /*
+    Grouped events are useful when you have distributed transactions
+    where you need to explicitly group, release and clear events upon
+    lifecycle events of a transaction.
+  */
+  // Given a eventGroupId, all the grouped events will be released
+  abstract releaseGroupedEvents(eventGroupId: string): Promise<void>
+  // Given a eventGroupId, all the grouped events will be cleared
+  abstract clearGroupedEvents(eventGroupId: string): Promise<void>
+
   protected storeSubscribers({
     event,
     subscriberId,