process replay: don't print diff when only uploading (#24514)

when only uploading no need to print success status or update diff

don't print succeed/fail when only uploading

selfdrive/test/process_replay/test_processes.py

@@ -185,6 +185,7 @@ if __name__ == "__main__":
         upload_file(cur_log_fn, os.path.basename(cur_log_fn))
         os.remove(cur_log_fn)
 
+  if not args.upload_only:
     diff1, diff2, failed = format_diff(results, ref_commit)
     with open(os.path.join(PROC_REPLAY_DIR, "diff.txt"), "w") as f:
       f.write(diff2)
@@ -192,7 +193,7 @@ if __name__ == "__main__":
 
     if failed:
       print("TEST FAILED")
-    if not upload:
+      if not args.update_refs:
         print("\n\nTo push the new reference logs for this commit run:")
         print("./test_processes.py --upload-only")
     else: