Adding OpenVINO Windows CI Pipeline (#23919)
### Description
<!-- Describe your changes. -->
Enable an OpenVINO Windows CI pipeline. This includes:
- Downloading the OpenVINO toolkit for Windows from an external source.
- Setting up OpenVINO environment variables.
- Building the ONNX Runtime OpenVINO Execution Provider.
- Running unit tests.
### 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. -->
This change is required to run checks on precommit and commit in the
ONNX Runtime project. It ensures that the code is tested with the
OpenVINO toolkit on Windows, improving the reliability and compatibility
of the project.
