Move DML packaging pipelines to aiinfra-dml-winbuild machine pool (#13487)
1. Move DML packaging pipelines to aiinfra-dml-winbuild machine pool
2. Delete
tools/ci_build/github/azure-pipelines/templates/windowsai-nuget-build.yml
because the pipeline has been migrated to Onebranch. I monitored it for
months, it worked well.