Temporarily revert stack conditional instantiation to outputs populate

When the module is optionally created, outputs don't validate. The outputs will go away entirely once the next iteration of terraform code is up, but for now, just rename the policies.

terraform/modules/csb/iam.tf

@@ -56,7 +56,7 @@ data "aws_iam_policy_document" "brokerpak_smtp" {
 }
 
 resource "aws_iam_policy" "brokerpak_smtp" {
-  name        = "brokerpak_smtp"
+  name        = "${var.stack_description}-brokerpak-smtp"
   description = "SMTP broker policy (covers SES, IAM, and supplementary Route53)"
   policy      = data.aws_iam_policy_document.brokerpak_smtp.json
 }

terraform/stacks/main/stack.tf

@@ -434,9 +434,6 @@ module "sns" {
 }
 
 module "csb" {
-  // Deploy only to development while iterating.
-  // See progress at https://github.com/cloud-gov/product/issues/2512.
-  count  = var.stack_description == "development" ? 1 : 0
   source = "../../modules/csb"
 
   stack_description = var.stack_description