onnxruntime

[VitisAI] optimize model clone (#21706)

### Description
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Optimize the memory consumption for model_clone which is a crucial part
of our model preparation


### Motivation and Context
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- If it fixes an open issue, please link to the issue here. -->
This is curcial for meeting the requirement for Microsoft's 8.15
release.

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Co-authored-by: Yueqing Zhang <yueqingz@amd.com>
Co-authored-by: Chunye Wang <chunywan@amd.com>