Upload docs preview (pytorch#2426)

Add step to upload docs preview in manager

preview at: https://docs-preview.pytorch.org/pytorch/tutorials/2426/index.html

.github/workflows/build-tutorials.yml

@@ -177,6 +177,16 @@ jobs:
 
           docker exec -t "${container_name}" sh -c ".jenkins/build.sh"
 
+      - name: Upload docs preview
+        uses: seemethere/upload-artifact-s3@v5
+        if: ${{ github.event_name == 'pull_request' }}
+        with:
+          retention-days: 14
+          s3-bucket: doc-previews
+          if-no-files-found: error
+          path: docs
+          s3-prefix: pytorch/tutorials/${{ github.event.pull_request.number }}
+
       - name: Teardown Linux
         uses: pytorch/test-infra/.github/actions/teardown-linux@main
         if: always()