onnxruntime

ef3caaf3 - [Clean up] Fix ep_name vs ep_registration_name usage in autoEP Python unit tests (#24667)

[Clean up] Fix ep_name vs ep_registration_name usage in autoEP Python unit tests (#24667) ### Description Cleans up the usage of `ep_name` and `ep_registration_name` in the autoEP Python unit tests. ### Motivation and Context Addresses comments from a previous PR: https://github.com/microsoft/onnxruntime/pull/24634 > nit: the registration name and EP names don't need to match. could we call this 'ep_name' to avoid potentially creating an assumption that they always do?