Split mode graph for Qwen3 (#1106)

Co-authored-by: Iwan Kawrakow <iwan.kawrakow@gmail.com>

src/llama.cpp

@@ -1731,6 +1731,7 @@ static bool is_model_split_supported(const llama_model & model) {
         LLM_ARCH_MISTRAL3,
         LLM_ARCH_COHERE2,
         LLM_ARCH_MIMO2,
+        LLM_ARCH_QWEN3,
     };
     auto it =  k_supported.find(model.arch);
     return it != k_supported.end();