add ScaledYOLOv4

[GreatV]

• [Dy2St] PyTorch 和 Paddle 仓库模型导出成功率对比任务 PaddlePaddle/Paddle#58985

pytorch 无法导出
paddle 可以导出

AssertionError: Mutating module attribute training during export.

from user code:
   File "/home/greatx/repos/ScaledYOLOv4/models/yolo.py", line 109, in forward
    return self.forward_once(x, profile)  # single-scale inference, train
  File "/home/greatx/repos/ScaledYOLOv4/models/yolo.py", line 129, in forward_once
    x = m(x)  # run
  File "/home/greatx/repos/ScaledYOLOv4/venv/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1527, in _call_impl
    return forward_call(*args, **kwargs)
  File "/home/greatx/repos/ScaledYOLOv4/models/yolo.py", line 34, in forward
    self.training |= self.export

Set TORCH_LOGS="+dynamo" and TORCHDYNAMO_VERBOSE=1 for more information

[SigureMo]

LGTMeow