upload ort-gpu-training python nightly package to azure feed (#6998)

tools/ci_build/github/azure-pipelines/templates/py-packaging-stage.yml

@@ -315,6 +315,34 @@ stages:
         inputs:
           ArtifactName: onnxruntime_gpu
 
+      - script: |
+          sudo apt-get update
+          sudo apt-get install python3-pip python-dev
+        displayName: 'sudo apt-get install python3-pip python-dev'
+
+      - script: |
+          python3 -m pip install twine
+        displayName: 'python3 -m pip install twine'
+        timeoutInMinutes: 20
+
+      # this block does not work because TwineAuthenticate@1 will trigger cleanup of $(PYPIRC_PATH)
+      # at the end of pipeline execution. Because $(PYPIRC_PATH) is already cleaned by clean-agent-build-directory-step.yml
+      # the cleanup task for TwineAuthenticate@1 will fail. For this reason, we cannot used TwineAuthenticate@1.
+      # - task: TwineAuthenticate@1
+      #   inputs:
+      #     artifactFeed: 'lotus/ort-gpu-nightly-training-feed'
+
+      # - script: |
+      #     python3 -m twine upload -r ort-gpu-nightly-training-feed --config-file $(PYPIRC_PATH) $(Build.ArtifactStagingDirectory)/Release/dist/*.whl
+      #   displayName: 'python3 -m twine upload -r ort-gpu-nightly-training-feed $(Build.ArtifactStagingDirectory)/Release/dist/*.whl'
+      #   timeoutInMinutes: 20
+
+      - script: |
+          python3 -m twine upload -r ORT-Nightly --repository-url https://aiinfra.pkgs.visualstudio.com/PublicPackages/_packaging/ORT-Nightly/pypi/upload \
+          --username $(ortpypitrainingnightlyusername) --password $(aiinfrapypifeedpassword) $(Build.ArtifactStagingDirectory)/Release/dist/*.whl
+        displayName: 'python3 -m twine upload $(Build.ArtifactStagingDirectory)/Release/dist/*.whl'
+        timeoutInMinutes: 20
+
       - template: component-governance-component-detection-steps.yml
         parameters:
           condition: 'succeeded'