onnxruntime

f14fd59f - More error checking for user provided C# policy selection delegate (#24666)

More error checking for user provided C# policy selection delegate (#24666) ### Description <!-- Describe your changes. --> Handle user selection policy delegate throwing or returning too many selections in C# code and create error message. ### Motivation and Context <!-- - Why is this change required? What problem does it solve? - If it fixes an open issue, please link to the issue here. -->