export bastion SA email address as tf output from sigstore module

Signed-off-by: Bob Callaway <[email protected]>

terraform/gcp/modules/bastion/outputs.tf

@@ -35,3 +35,7 @@ output "ip_address" {
   description = "private IP address of bastion"
   value       = google_compute_instance.bastion.network_interface.0.network_ip
 }
+
+output "sa_email" {
+  value = google_service_account.bastion.email
+}

terraform/gcp/modules/sigstore/outputs.tf

@@ -120,3 +120,8 @@ output "bastion_kubectl" {
   description = "kubectl command using the local proxy once the bastion_ssh command is running"
   value       = "HTTPS_PROXY=socks5://localhost:8118 kubectl get pods --all-namespaces"
 }
+
+output "bastion_sa_email" {
+  description = "Email of the SA that the Bastion runs under."
+  value       = module.bastion.sa_email
+}