support stale topic for ingest-events (#82549)

similarly to transactions, will get a dedicated lowpri topic later, for
now testing by sending stale events to ingest-events-dlq

src/sentry/consumers/__init__.py

@@ -347,6 +347,7 @@ KAFKA_CONSUMERS: Mapping[str, ConsumerDefinition] = {
             "consumer_type": ConsumerType.Events,
         },
         "dlq_topic": Topic.INGEST_EVENTS_DLQ,
+        "stale_topic": Topic.INGEST_EVENTS_DLQ,
     },
     "ingest-feedback-events": {
         "topic": Topic.INGEST_FEEDBACK_EVENTS,