Add the support for stack_group_points ops with Ascend on 1.x branch

mmcv/ops/csrc/pytorch/npu/stack_group_points_npu.cpp

@@ -0,0 +1,25 @@
+#include "pytorch_npu_helper.hpp"
+
+using namespace NPU_NAME_SPACE;
+using namespace std;
+
+void stack_group_points_forward_npu(int b, int c, int n, int nsample,
+                                    const Tensor features_tensor,
+                                    const Tensor features_batch_cnt_tensor,
+                                    const Tensor idx_tensor,
+                                    const Tensor idx_batch_cnt_tensor,
+                                    Tensor out_tensor) {
+  EXEC_NPU_CMD(aclnnStackGroupPoints, features_tensor,
+               features_batch_cnt_tensor, idx_tensor, idx_batch_cnt_tensor,
+               out_tensor);
+}
+
+void stack_group_points_forward_impl(int b, int c, int n, int nsample,
+                                     const Tensor features_tensor,
+                                     const Tensor features_batch_cnt_tensor,
+                                     const Tensor idx_tensor,
+                                     const Tensor idx_batch_cnt_tensor,
+                                     Tensor out_tensor);
+
+REGISTER_NPU_IMPL(stack_group_points_forward_impl,
+                  stack_group_points_forward_npu);