onnxruntime

03835c47 - Remove stale foundry local custom nuget packaging pipeline. (#32760)

Remove stale foundry local custom nuget packaging pipeline. (#32760) This pull request removes three Azure Pipelines YAML templates related to custom NuGet packaging, managed NuGet packaging, and building Python QNN wheels for Windows x64. These files are no longer needed and are being deleted from the repository. The most important changes are: **Pipeline and Template Cleanup:** * Deleted the entire `custom-nuget-packaging-pipeline.yml` pipeline definition, which handled custom NuGet packaging across multiple platforms and included compliance, signing, and artifact publishing steps. * Removed the `foundry-local-nuget-packaging.yml` template, which defined the packaging and signing process for the Foundry NuGet package. * Removed the `managed-nuget-for-foundry-local.yml` template, which built and signed the managed NuGet package for OnnxRuntime. * Deleted the `py-win-x64-qnn.yml` template, which built and published Python QNN wheels for Windows x64 across multiple Python versions.