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/core/core-flows/src/common/steps/emit-event.ts

@@ -35,7 +35,7 @@ export const emitEventStep = createStep(
       context,
     })
 
-    await eventBus.emit([message])
+    await eventBus.emit(message)
   },
   async (data: void) => {}
 )