onnxruntime

Fix WinML Test Case: create LearningModelBinding for every testcase (#13587)

### Description
Fix #13509

### Motivation and Context
The exception was caused by the incorrect fetches, which was from the
binding with last test cases.

https://github.com/microsoft/onnxruntime/blob/efcbdac58e542273c7cd42f5e5bcd01c0218f0e3/onnxruntime/core/session/onnxruntime_c_api.cc#L809-L815