chore: ability to group events on redis event bus (#7655)

* chore: ability to group events on redis event bus

* chore: fix tests

* Update packages/modules/event-bus-redis/src/services/event-bus-redis.ts

Co-authored-by: Adrien de Peretti <adrien.deperetti@gmail.com>

* chore: change shape of input and body data

* chore: fix builds

* chore: address comments

* chore: fix unit test

---------

Co-authored-by: Adrien de Peretti <adrien.deperetti@gmail.com>

packages/modules/fulfillment/integration-tests/__fixtures__/events.ts

@@ -10,15 +10,13 @@ export function buildExpectedEventMessageShape(options: {
 }): EventBusTypes.Message {
   return {
     eventName: options.eventName,
-    body: {
-      metadata: {
-        action: options.action,
-        eventGroupId: options.eventGroupId,
-        source: "fulfillment",
-        object: options.object,
-      },
-      data: options.data,
+    metadata: {
+      action: options.action,
+      eventGroupId: options.eventGroupId,
+      source: "fulfillment",
+      object: options.object,
     },
+    data: options.data,
     options: options.options,
   }
 }