Improve Nuget-CUDA-Packaging-Pipeline (#19668)
### Description
<!-- Describe your changes. -->
* Publish the artifacts as late as possible
* once published the artifacts are immutable, and any retry will fail if
they exist
* if any step fails after publishing the stage cannot be retried
* use powershell to cleanup
* DeleteFiles is taking >30 mins and causing the stage to timeout
* powershell took < 1s
### 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. -->
Make pipeline more robust
