Function gpu_alloc

experimental/kernels/gpt2_webgpu.cpp:203–207

void gpu_alloc(Context& ctx, Tensor* tensors, size_t* sizes, size_t n) { 
    for (size_t i = 0; i < n; i++) {
        tensors[i] = createTensor(ctx, Shape{sizes[i]}, kf32);
    }
}

typedef struct {
    GPT2Config config;