pattern: Bump packet split to chunk of 1000 records

Listers like github and bitbucket should not be impacted as they already list 1000
records per page.

swh/lister/pattern.py

@@ -223,7 +223,7 @@ class Lister(Generic[StateType, PageType]):
           the number of listed origins recorded in the scheduler
         """
         count = 0
-        for batch_origins in grouper(origins, n=100):
+        for batch_origins in grouper(origins, n=1000):
             ret = self.scheduler.record_listed_origins(batch_origins)
             count += len(ret)