batch: migrate the rest of examples to llama_batch_ext (#29601)

* migrate the rest

* test-thread-safety

* rm common_batch_staged

examples/debug/debug.cpp

@@ -194,7 +194,8 @@ static bool run(llama_context * ctx, const common_params & params) {
         return false;
     }
 
-    if (llama_decode(ctx, llama_batch_get_one(tokens.data(), tokens.size()))) {
+    common_batch batch = common_batch_get_one(ctx, tokens);
+    if (llama_process(ctx, LLAMA_PROCESS_TYPE_DECODE, batch.get())) {
         LOG_ERR("%s : failed to eval\n", __func__);
         return false;
     }