fix list entities perf test (#33839)

Author: swathipil

sdk/tables/azure-data-tables/tests/perfstress_tests/list_entities.py

@@ -6,20 +6,20 @@
 
 from ._base import _TableTest, get_base_entity
 
-
 class ListEntitiesTest(_TableTest):
     def __init__(self, arguments):
         super().__init__(arguments)
-        self.base_entity = get_base_entity(self.args.full_edm)
-        self.base_entity["PartitionKey"] = str(uuid.uuid4())
+        self.partition_key = str(uuid.uuid4())
 
     async def global_setup(self):
         await super().global_setup()
         batch_size = 0
         batch = []
         for row in range(self.args.count):
-            self.base_entity["RowKey"] = str(row)
-            batch.append(("create", self.base_entity))
+            base_entity = get_base_entity(self.args.full_edm)
+            base_entity["PartitionKey"] = self.partition_key
+            base_entity["RowKey"] = str(row)
+            batch.append(("create", base_entity))
             batch_size += 1
             if batch_size >= 100:
                 await self.async_table_client.submit_transaction(batch)