[terraform][openstack] allow disabling port_security at port level (#8455)

Use openstack_networking_port_v2 and openstack_networking_floatingip_associate_v2
to attach floating ips. This gives us more flexibility on disabling port security
when binding instances directly on provider networks in private cloud scenario.

contrib/terraform/openstack/modules/compute/variables.tf

@@ -106,8 +106,6 @@ variable "k8s_allowed_egress_ips" {
 
 variable "k8s_nodes" {}
 
-variable "wait_for_floatingip" {}
-
 variable "supplementary_master_groups" {
   default = ""
 }