feat(iaas): min/max acc tests (#811)

* feat(iaas): security group min/max acc test

* feat(iaas): image min/max acc test

* feat(iaas): KeyPair min/max acc test

* feat(iaas): Network area min/max acc test
- fix: wrong atLeast-validator for `minimum_prefix_length`

* feat(iaas): Network min/max acc test

* feat(iaas): Volume min/max acc test
- fix: volume update doesn't work if no name was defined
- fix: volume.server_id can not be set
- fix: error message volume.size returns value but was null

* feat(iaas): Network interfaces min/max acc test

* feat(iaas): Affinity groups acc test

* feat(iaas): Server min/max acc test
- stackit_server_volume_attach
- stackit_server_network_interface_attach
- stackit_server_service_account_attach

* fix(iaas): acc test
- image: fix read of Config.VirtioScsi
- keypair: add missing RequiresReplace() for name
- server: add missing UserData read in datasource and resource

* feat(iaas): public ip acc test
- fix: when a nic is assigned to a public ip, the field network_interface_id leads to recreation

stackit/internal/services/iaas/testdata/resource-network-area-max.tf

@@ -0,0 +1,41 @@
+variable "organization_id" {}
+
+variable "name" {}
+variable "transfer_network" {}
+variable "network_ranges_prefix" {}
+variable "default_nameservers" {}
+variable "default_prefix_length" {}
+variable "max_prefix_length" {}
+variable "min_prefix_length" {}
+
+variable "route_prefix" {}
+variable "route_next_hop" {}
+variable "label" {}
+
+resource "stackit_network_area" "network_area" {
+  organization_id = var.organization_id
+  name            = var.name
+  network_ranges = [
+    {
+      prefix = var.network_ranges_prefix
+    }
+  ]
+  transfer_network      = var.transfer_network
+  default_nameservers   = [var.default_nameservers]
+  default_prefix_length = var.default_prefix_length
+  max_prefix_length     = var.max_prefix_length
+  min_prefix_length     = var.min_prefix_length
+  labels = {
+    "acc-test" : var.label
+  }
+}
+
+resource "stackit_network_area_route" "network_area_route" {
+  organization_id = stackit_network_area.network_area.organization_id
+  network_area_id = stackit_network_area.network_area.network_area_id
+  prefix          = var.route_prefix
+  next_hop        = var.route_next_hop
+  labels = {
+    "acc-test" : var.label
+  }
+}