Fix missing a2a backend init of GLM4.5 MoE Block (#11692)

Signed-off-by: Shangming Cai <csmthu@gmail.com>

python/sglang/srt/models/glm4_moe.py

@@ -467,7 +467,7 @@ class Glm4MoeSparseMoeBlock(DeepseekV2MoE):
 
         self.top_k = config.num_experts_per_tok
 
-        if get_moe_a2a_backend().is_deepep():
+        if get_moe_a2a_backend().is_deepep() or get_moe_a2a_backend().is_mooncake():
             # TODO: we will support tp < ep in the future
             self.ep_size = get_moe_expert_parallel_world_size()
             self.num_experts = (
@@ -496,7 +496,9 @@ class Glm4MoeSparseMoeBlock(DeepseekV2MoE):
                 return_recv_hook=True,
             )
 
-        self._enable_deepep_moe = get_moe_a2a_backend().is_deepep()
+        self._enable_a2a_moe = (
+            get_moe_a2a_backend().is_deepep() or get_moe_a2a_backend().is_mooncake()
+        )
 
     def forward_normal_dual_stream(
         self,