fix the cuda EP test failure (#14087)
### Description
Fix a regression failure for cuda EP test
### Motivation and Context
CudaEP test is a special test case under EP folder, not in test folder.
when refactor the code during multi-stream work, we missed it. This PR
is to fix the test.
Co-authored-by: Cheng Tang <chenta@microsoft.com@orttrainingdev9.d32nl1ml4oruzj4qz3bqlggovf.px.internal.cloudapp.net>
