!17410 bugfix for reducescatter

From: @alouhahahahaha
Reviewed-by: @zhoufeng54,@yuchaojie
Signed-off-by: @yuchaojie

mindspore/ccsrc/backend/optimizer/ascend/enhancer/split_inputs_for_reduce_scatter.cc

@@ -44,7 +44,7 @@ std::vector<AnfNodePtr> SplitInputsForReduceScatter::InsertSplitForInput(const F
     AnfAlgo::SetOutputInferTypeAndShape(dtypes, shapes, split.get());
 
     AnfAlgo::SetNodeAttr("split_dim", MakeValue(0L), split);
-    AnfAlgo::SetNodeAttr("num_split", MakeValue(rank_size_t), split);
+    AnfAlgo::SetNodeAttr("num_split", MakeValue(rank_size), split);
     AnfAlgo::SetNodeAttr("size_splits", MakeValue(size_splits), split);
     kernel_select_->SelectKernel(split);
     std::vector<AnfNodePtr> new_outputs;