fix: [cp25]Missing kwargs in load_partition (#2792)

Signed-off-by: yangxuan <xuan.yang@zilliz.com>

Author: XuanYang-cn

pymilvus/client/grpc_handler.py

@@ -1350,6 +1350,7 @@ def load_partitions(
             collection_name=collection_name,
             partition_names=partition_names,
             replica_number=replica_number,
+            **kwargs,
         )
         response = self._stub.LoadPartitions(
             request, timeout=timeout, metadata=_api_level_md(**kwargs)

pymilvus/client/prepare.py

@@ -1263,7 +1263,7 @@ def load_partitions(
 
         if "load_fields" in kwargs or "_load_fields" in kwargs:
             load_fields = kwargs.get("load_fields", kwargs.get("_load_fields"))
-            req.load_fields = load_fields
+            req.load_fields.extend(load_fields)
 
         if "skip_load_dynamic_field" in kwargs or "_skip_load_dynamic_field" in kwargs:
             skip_load_dynamic_field = kwargs.get(