chore(seer): Increase backfill batch size to 40 and reduce delay to 5s

Previous settings were too conservative. Seer processes tasks quickly
so we can increase throughput without overloading it.

Author: yuvmen

src/sentry/tasks/seer/backfill_supergroups_lightweight.py

@@ -25,8 +25,8 @@
 
 logger = logging.getLogger(__name__)
 
-BATCH_SIZE = 25
-INTER_BATCH_DELAY_S = 10
+BATCH_SIZE = 40
+INTER_BATCH_DELAY_S = 5
 MAX_FAILURES_PER_BATCH = 10