Merge in 'release/6.0' changes

Author: dotnet-bot

eng/pipelines/runtime-official.yml

@@ -392,6 +392,7 @@ stages:
       jobParameters:
         buildArgs: -s libs -allConfigurations -c $(_BuildConfig) /p:TestAssemblies=false /p:TestPackages=true
         nameSuffix: Libraries_AllConfigurations
+        isOfficialBuild: ${{ variables.isOfficialBuild }}
         postBuildSteps:
           - template: /eng/pipelines/common/upload-intermediate-artifacts-step.yml
             parameters: