Move nested VMR artifacts to root (#19301)

eng/pipelines/templates/jobs/sdk-diff-tests.yml

@@ -74,6 +74,10 @@ jobs:
       patterns: '**/Private.SourceBuilt.Artifacts.+([0-9]).+([0-9]).+([0-9])?(-@(alpha|preview|rc|rtm)*).${{ parameters.targetRid }}.tar.gz' 
       displayName: Download Source Built Artifacts
 
+  - script: |
+      find $(Pipeline.Workspace)/Artifacts -type f -exec mv {} $(Pipeline.Workspace)/Artifacts \;
+    displayName: Move Artifacts to root
+
   - script: |
       platform="linux"
       if [[ ${{ parameters.targetRid }} =~ "alpine" ]]; then