fix: Add dataflow connection in service account for dataflow developer role (#156)

Author: amrkk123

modules/simple-sa/metadata.yaml

@@ -103,6 +103,11 @@ spec:
               version: ">= 10.0"
             spec:
               outputExpr: "[\"roles/bigquery.dataEditor\"]"
+          - source:
+              source: github.com/terraform-google-modules/terraform-google-dataflow//modules/flex
+              version: ">= 3.0.1"
+            spec:
+              outputExpr: "[\"roles/dataflow.worker\",\"roles/dataflow.developer\", "\"roles/storage.objectAdmin\""]"
     outputs:
       - name: account_details
         description: Service account id and email