onnxruntime

d1d40fba - [VitisAI][Fix] ShapeInferContext GetAttrxxxs support empty value (#21471)

[VitisAI][Fix] ShapeInferContext GetAttrxxxs support empty value (#21471) ### Description Bug fix for the ShapeInferContext GetAttrxxxs APIs. Node attribute maybe is empty. ### Motivation and Context If the attr value is empty, the expected result through the interface is empty , but currently, it returns a meaningless {0}. --------- Co-authored-by: mingyue <mingyue@amd.com> Co-authored-by: Liu Minyue <mingyue@xilinx.com>