[1/n]: add cutlass W4A8 moe kernel for hopper architecture (#7772)

Signed-off-by: yangsijia.614 <yangsijia.614@bytedance.com>
Co-authored-by: yicwang <yichen.wang@bytedance.com>

sgl-kernel/include/sgl_kernel_ops.h

@@ -467,6 +467,35 @@ void transfer_kv_all_layer_mla_direct(
     int64_t page_size,
     int64_t num_layers);
 
+/*
+ * From csrc/moe/cutlass_moe/w4a8
+ */
+void get_cutlass_w4a8_moe_mm_data(
+    const torch::Tensor& topk_ids,
+    torch::Tensor& expert_offsets,
+    torch::Tensor& problem_sizes1,
+    torch::Tensor& problem_sizes2,
+    torch::Tensor& input_permutation,
+    torch::Tensor& output_permutation,
+    const int64_t num_experts,
+    const int64_t n,
+    const int64_t k);
+
+void cutlass_w4a8_moe_mm(
+    torch::Tensor& d_tensors,
+    torch::Tensor const& a_tensors,
+    torch::Tensor const& b_tensors,
+    torch::Tensor const& a_scales,
+    torch::Tensor const& b_scales,
+    torch::Tensor const& expert_offsets,
+    torch::Tensor const& problem_sizes,
+    torch::Tensor const& a_strides,
+    torch::Tensor const& b_strides,
+    torch::Tensor const& d_strides,
+    torch::Tensor const& s_strides,
+    int64_t chunk_size,
+    int64_t topk);
+
 /*
  * From FlashInfer
  */