[Plugin EP] Add plugin EP APIs to retrieve ONNX operator schemas#27713

adrianlizarraga merged 26 commits into

mainmicrosoft/onnxruntime:mainfrom

adrianl/PluginEp_Kernels_GetOpSchemamicrosoft/onnxruntime:adrianl/PluginEp_Kernels_GetOpSchemaCopy head branch name to clipboard