[Openstack] Add bastion_allowed_ports to allow custom security group rules on bastion node (#9336)

* make it possible to configure bastion remote ips

* Update README.md

contrib/terraform/openstack/variables.tf

@@ -257,6 +257,12 @@ variable "worker_allowed_ports" {
   ]
 }
 
+variable "bastion_allowed_ports" {
+  type = list(any)
+
+  default = []
+}
+
 variable "use_access_ip" {
   default = 1
 }