Add back nuget packages as artifacts

These disappeared at some point :(

azure-pipelines.yml

@@ -103,6 +103,14 @@ phases:
         ArtifactName: MPack_$(Agent.Os)_$(Agent.JobName)
       continueOnError: true
       condition: eq(variables['_BuildConfig'], 'Release')
+    - task: PublishBuildArtifacts@1
+      displayName: Publish package artifacts
+      inputs:
+        PathtoPublish: $(Build.SourcesDirectory)/artifacts/packages/$(_BuildConfig)
+        PublishLocation: Container
+        ArtifactName: Packages_$(Agent.Os)_$(Agent.JobName)
+      continueOnError: true
+      condition: eq(variables['_BuildConfig'], 'Release')
     - task: PublishBuildArtifacts@1
       displayName: Publish Logs
       inputs: