[#1661] Make FAST stage 1 resman tf destroy more reliable

Co-authored-by: Luca Prete <lucaprete@google.com>

fast/stages/1-resman/outputs.tf

@@ -223,9 +223,9 @@ locals {
   tfvars = {
     folder_ids       = local.folder_ids
     service_accounts = local.service_accounts
-    tag_keys         = { for k, v in module.organization.tag_keys : k => v.id }
+    tag_keys         = { for k, v in try(module.organization.tag_keys, {}) : k => v.id }
     tag_names        = var.tag_names
-    tag_values       = { for k, v in module.organization.tag_values : k => v.id }
+    tag_values       = { for k, v in try(module.organization.tag_values, {}) : k => v.id }
   }
 }