Dump sarif diagnostics for failed onnx exports in benchmark (#115673)

Summary:
X-link: pytorch/pytorch#115673
Approved by: https://github.com/thiagocrepaldi
ghstack dependencies: #115670

Reviewed By: jeanschmidt

Differential Revision: D52244277

fbshipit-source-id: 7c43535df8626c89cc6f5f25b38578b734b6dc69

userbenchmark/dynamo/dynamobench/common.py

@@ -1582,6 +1582,11 @@ def run_n_iterations_onnx(model, inputs, n=2):
                 output_csv(
                     output_error_filename, parsed_error.headers, parsed_error.row
                 )
+            if context.onnx_model is not None:
+                e.onnx_program.save_diagnostics(
+                    f"{context.onnx_model.model_dir}/"
+                    f"{current_onnx_compiler}_{current_name}_{current_device}.sarif"
+                )
 
             # Check also the raw exception that caused export failure.
             # Skip if it is already analyzed by diagnostics.