Add warning of benchmark_app about disabling auto batching (#13907)

* merge master

* reset original format

* remove AUTO

* Update tools/benchmark_tool/openvino/tools/benchmark/main.py

Co-authored-by: Zlobin Vladimir <vladimir.zlobin@intel.com>

* delete condition

* delete condition in py

Co-authored-by: Zlobin Vladimir <vladimir.zlobin@intel.com>
Co-authored-by: Chen Peter <peter.chen@intel.com>

samples/cpp/benchmark_app/main.cpp

@@ -600,6 +600,7 @@ int main(int argc, char* argv[]) {
 
         // If set batch size, disable the auto batching
         if (FLAGS_b > 0) {
+            slog::warn << "Batch size is set. Auto batching will be disabled" << slog::endl;
             core.set_property(ov::hint::allow_auto_batching(false));
         }