add test for triton mla

Author: Linboyan-trc

fastdeploy/model_executor/models/deepseek_v3.py

@@ -489,11 +489,7 @@ def forward(
                 attn_out = attn_out * ((F.softsign(gate_out) + 1.0) / 2.0)
             else:
                 raise NotImplementedError(f"{gated_attn_act} not implemented")
-        if attn_out is None:
-            attn_out = paddle.zeros(
-                [hidden_states.shape[0], self.num_attention_heads_tp * self.v_head_dim],
-                dtype=hidden_states.dtype,
-            )
+
         output = self.o_proj(attn_out)
         return output