Add the path to the ssh key to connect to the cluster's instances as an output (#24969)

* fix: add the ssh key pem path to te outputs and fix the message with the correct path

* func: add ssh pem key as output

e2e/terraform/provision-infra/outputs.tf

@@ -81,6 +81,10 @@ output "key_file" {
   value = "${abspath(local.keys_dir)}/tls_api_client.key"
 }
 
+output "ssh_key_file" {
+  value = "${abspath(local.keys_dir)}/${local.random_name}.pem"
+}
+
 output "nomad_token" {
   value     = "${data.local_sensitive_file.nomad_token.content}"
   sensitive = true