Enable xnnpack ep works in current windows xnn ci (#21951)
### Description
The EP wasn't added in session option in onnxruntime_test_all.
### Motivation and Context
After this PR
onnxruntime_test_all --gtest_filter=\*xnnpack\*maxpool\* can step into
https://github.com/microsoft/onnxruntime/blob/8c5336449d2279c0394cc4a742d336d7f3bd4124/onnxruntime/core/providers/xnnpack/nn/max_pool.cc#L209
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Co-authored-by: Yi Zhang <your@email.com>
