!8991 Optimize log level to DEBUG in array reduce gpu kernel

From: @zpac
Reviewed-by: @cristoval,@kisnwang
Signed-off-by: @cristoval

mindspore/ccsrc/backend/kernel_compiler/gpu/arrays/array_reduce_gpu_kernel.h

@@ -54,7 +54,7 @@ class ArrayReduceGpuKernel : public GpuKernel {
     const float alpha = 1;
     const float beta = 0;
     if (all_match_) {
-      MS_LOG(WARNING)
+      MS_LOG(DEBUG)
         << "The corresponding dimensions of the input and output tensors all match. No need to call cuDNN kernel.";
       CHECK_CUDA_RET_WITH_EXCEPT(cudaMemcpyAsync(output_addr, input_addr, inputs[0]->size, cudaMemcpyDeviceToDevice,
                                                  reinterpret_cast<cudaStream_t>(stream_ptr)),