onnxruntime

866c7e3a - [VitisAI] add new api to VitisAI to save graph as a string (#25602)

[VitisAI] add new api to VitisAI to save graph as a string (#25602) ### Description Add new API to VitisAI to save graph as a string ### Motivation and Context to support in-memory flow --------- Co-authored-by: yifei <y.zhou@xilinx.com>