Add support for Laguna XS.2 & M.1 (#25165)

tests/test-llama-archs.cpp

@@ -362,6 +362,7 @@ static bool moe_mandatory(const llm_arch arch) {
         case LLM_ARCH_STEP35:
         case LLM_ARCH_MISTRAL4:
         case LLM_ARCH_MELLUM:
+        case LLM_ARCH_LAGUNA:
             return true;
         default:
             return false;