Turn on TORCH_ROCM_AOTRITON_ENABLE_EXPERIMENTAL by default. (#10168)

main.py

@@ -115,6 +115,7 @@ if os.name == "nt":
     os.environ['MIMALLOC_PURGE_DELAY'] = '0'
 
 if __name__ == "__main__":
+    os.environ['TORCH_ROCM_AOTRITON_ENABLE_EXPERIMENTAL'] = '1'
     if args.default_device is not None:
         default_dev = args.default_device
         devices = list(range(32))