chore: import upstream snapshot with attribution

source/backend/cuda/execution/plugin/SeqLen2Spatial/seqLen2SpatialKernel.h

@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 1993-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SEQLEN2SPATIAL_KERNEL_H
+#define SEQLEN2SPATIAL_KERNEL_H
+
+#include <cstdint>
+#include <cuda.h>
+#include <cuda_fp16.h>
+#include <cuda_runtime_api.h>
+#include "backend/cuda/core/CUDABackend.hpp"
+
+using half = __half;
+
+int32_t launchSeqLen2SpatialKernel(void const* input0, void const* input1, void const* input2, void* output0, bool isHalf,
+    int32_t gridSize, int32_t C, cudaStream_t stream = 0);
+
+#endif // SEQLEN2SPATIAL_KERNEL_H