chore: Modify the output consistency

Signed-off-by: Alan Tang <[email protected]>

Author: Standing-Man

datafusion/core/tests/physical_optimizer/limit_pushdown.rs

@@ -234,7 +234,7 @@ fn transforms_coalesce_batches_exec_into_fetching_version_and_removes_local_limi
 
     let expected = [
         "CoalescePartitionsExec: fetch=5",
-        "  CoalesceBatchesExec: target_batch_size=8192, fetch=5",
+        "  CoalesceBatchesExec: target_batch_size=8192, limit=5",
         "    FilterExec: c3@2 > 0",
         "      RepartitionExec: partitioning=RoundRobinBatch(8), input_partitions=1",
         "        StreamingTableExec: partition_sizes=1, projection=[c1, c2, c3], infinite_source=true"
@@ -299,7 +299,7 @@ fn pushes_global_limit_exec_through_projection_exec_and_transforms_coalesce_batc
 
     let expected = [
             "ProjectionExec: expr=[c1@0 as c1, c2@1 as c2, c3@2 as c3]",
-            "  CoalesceBatchesExec: target_batch_size=8192, fetch=5",
+            "  CoalesceBatchesExec: target_batch_size=8192, limit=5",
             "    StreamingTableExec: partition_sizes=1, projection=[c1, c2, c3], infinite_source=true"
         ];
     assert_eq!(get_plan_string(&after_optimize), expected);