stackit: add k8s api load balancer (#2925)

terraform/infrastructure/openstack/modules/stackit_loadbalancer/variables.tf

@@ -0,0 +1,30 @@
+variable "name" {
+  type        = string
+  description = "Base name of the load balancer."
+}
+
+variable "member_ips" {
+  type        = list(string)
+  description = "IP addresses of the members of the load balancer pool."
+  default     = []
+}
+
+variable "network_id" {
+  type        = string
+  description = "ID of the network."
+}
+
+variable "external_address" {
+  type        = string
+  description = "External address of the load balancer."
+}
+
+variable "ports" {
+  type        = map(number)
+  description = "Ports to listen on incoming traffic."
+}
+
+variable "stackit_project_id" {
+  type        = string
+  description = "STACKIT project ID."
+}