feat: Add support for Auto Scaling Group Instance Refresh for self-managed worker groups (#1224)

Co-authored-by: Thierno IB. BARRY <ibrahima.br@gmail.com>

workers.tf

@@ -162,6 +162,33 @@ resource "aws_autoscaling_group" "workers" {
     }
   }
 
+  # logic duplicated in workers_launch_template.tf
+  dynamic "instance_refresh" {
+    for_each = lookup(var.worker_groups[count.index],
+      "instance_refresh_enabled",
+    local.workers_group_defaults["instance_refresh_enabled"]) ? [1] : []
+    content {
+      strategy = lookup(
+        var.worker_groups[count.index], "instance_refresh_strategy",
+        local.workers_group_defaults["instance_refresh_strategy"]
+      )
+      preferences {
+        instance_warmup = lookup(
+          var.worker_groups[count.index], "instance_refresh_instance_warmup",
+          local.workers_group_defaults["instance_refresh_instance_warmup"]
+        )
+        min_healthy_percentage = lookup(
+          var.worker_groups[count.index], "instance_refresh_min_healthy_percentage",
+          local.workers_group_defaults["instance_refresh_min_healthy_percentage"]
+        )
+      }
+      triggers = lookup(
+        var.worker_groups[count.index], "instance_refresh_triggers",
+        local.workers_group_defaults["instance_refresh_triggers"]
+      )
+    }
+  }
+
   lifecycle {
     create_before_destroy = true
     ignore_changes        = [desired_capacity]