use pipeline variable to set SECRET_SA_ACCOUNT_NAME

.pipelines/e2e.yml

@@ -46,7 +46,7 @@ jobs:
 
       - script: |
           az account set -s $AZURE_SUBSCRIPTION_ID
-          SECRET_SA_ACCOUNT_NAME=e2earosecrets make secrets
+          SECRET_SA_ACCOUNT_NAME=$(SECRET_SA_ACCOUNT_NAME) make secrets
           . secrets/env
 
           export CI=true