onnxruntime

2e0f717b - Remove the python installation steps from win-qnn-arm64-ci-pipeline.yml (#25552)

Remove the python installation steps from win-qnn-arm64-ci-pipeline.yml (#25552) ### Description Yesterday I updated the machine images. Now they already have python preinstalled. We don't need to do this anymore. Remove the steps to avoid conflicts. Also, refactor the yaml file a little bit. Refactors templates to use parameterized Python versions instead of matrix strategy.