Initial test: pushing VS NuPkgs to an external feed: "CrossTest"

eng/build.yml

@@ -98,6 +98,15 @@ phases:
                   $(_AdditionalBuildParameters)
         displayName: Build
 
+    - ${{ if ne(parameters.agentOs, 'Windows_NT') }}:
+        - task: NuGetCommand@2
+            displayName: 'Push Visual Studio NuPkgs'
+        inputs:
+            command: push
+            packagesToPush: '$(Build.SourcesDirectory)/artifacts/packages/$(_BuildConfig)/NonShipping/VS.*.nupkg'
+            nuGetFeedType: external
+            publishFeedCredentials: CrossTest
+
     - task: PublishTestResults@1	
       displayName: Publish Test Results	
       inputs:	
@@ -143,4 +152,4 @@ phases:
           PublishLocation: Container
           ArtifactName: AssetManifests
         continueOnError: ${{ parameters.continueOnError }}
-        condition: and(succeeded(), eq(variables['_DotNetPublishToBlobFeed'], 'true'), eq(variables['_PublishBuildAssetManifest'], 'true'))
+        condition: and(succeeded(), eq(variables['_DotNetPublishToBlobFeed'], 'true'), eq(variables['_PublishBuildAssetManifest'], 'true'))