Add source build tarball setup nuget feeds and remove unused group (#12079)

.vsts-ci.yml

@@ -16,7 +16,6 @@ variables:
   value: true
 - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
   - group: DotNet-DotNetCli-Storage
-  - group: DotNet-Blob-Feed
   - group: DotNet-Installer-SDLValidation-Params
   - name: _PublishUsingPipelines
     value: true

src/SourceBuild/Arcade/eng/common/templates/job/source-build-create-tarball.yml

@@ -17,6 +17,14 @@ jobs:
     clean: all
 
   steps:
+  - ${{ if ne(variables['System.TeamProject'], 'public') }}:
+    - task: Bash@3
+      displayName: Setup Private Feeds Credentials
+      inputs:
+        filePath: $(Build.SourcesDirectory)/eng/common/SetupNugetSources.sh
+        arguments: $(Build.SourcesDirectory)/NuGet.config $Token
+      env:
+        Token: $(dn-bot-dnceng-artifact-feeds-rw)
   - script: |
       set -x
       df -h