moe_gating_top_k (#5271)

1. What this PR does / why we need it?
This PR supports the moe_gating_top_k operator, which enables
post-positioned renormalization (renorm) on the basis of softmax.
2. Does this PR introduce any user-facing change?
No user-facing changes are required.
3. How was this patch tested?
This patch was tested with the test_npu_moe_gating_top_k test case.
vLLM version: release/v0.13.0
vLLM main:
ad32e3e19c

---------

Signed-off-by: ZCG12345 <2097562023@qq.com>
Signed-off-by: zzzzwwjj <34335947+zzzzwwjj@users.noreply.github.com>
Co-authored-by: zzzzwwjj <34335947+zzzzwwjj@users.noreply.github.com>

csrc/build_aclnn.sh

@@ -24,7 +24,7 @@ elif [[ "$SOC_VERSION" =~ ^ascend910b ]]; then
     ABSOLUTE_CATLASS_PATH=$(cd "${CATLASS_PATH}" && pwd)
     export CPATH=${ABSOLUTE_CATLASS_PATH}:${CPATH}
 
-    CUSTOM_OPS="grouped_matmul_swiglu_quant_weight_nz_tensor_list;lightning_indexer;sparse_flash_attention;matmul_allreduce_add_rmsnorm;moe_init_routing_custom"
+    CUSTOM_OPS="grouped_matmul_swiglu_quant_weight_nz_tensor_list;lightning_indexer;sparse_flash_attention;matmul_allreduce_add_rmsnorm;moe_init_routing_custom;moe_gating_top_k"
     SOC_ARG="ascend910b"
 elif [[ "$SOC_VERSION" =~ ^ascend910_93 ]]; then
     # ASCEND910C (A3) series
@@ -70,6 +70,7 @@ elif [[ "$SOC_VERSION" =~ ^ascend910_93 ]]; then
         "dispatch_layout"
         "notify_dispatch"
         "moe_init_routing_custom"
+        "moe_gating_top_k"
     )
     CUSTOM_OPS=$(IFS=';'; echo "${CUSTOM_OPS_ARRAY[*]}")
     SOC_ARG="ascend910_93"