Upgrading from 7.9.0 to 8.0.0 breaks existing google_compute_instance_template

[jsumali]

TL;DR

Upgrading from 7.9.0 to 8.0.0, google_compute_instance_template tries to get updated with network_interface.stack_type = IPV4_ONLY but fails since templates can't be updated.

Expected behavior

The template should be recreated instead of trying to be updated.

Observed behavior

Terraform will perform the following actions:

  # module.appname-instance-template.google_compute_instance_template.tpl will be updated in-place
  ~ resource "google_compute_instance_template" "tpl" {
        id                   = "..."
        name                 = "appname-20221013075303688800000005"
        tags                 = [
            "allow-from-bastion",
            "appname",
        ]
        # (8 unchanged attributes hidden)

      ~ network_interface {
            name               = "nic0"
          + stack_type         = "IPV4_ONLY"
            # (4 unchanged attributes hidden)
        }

        # (5 unchanged blocks hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

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  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

module.appname-instance-template.google_compute_instance_template.tpl: Modifying... [id=...]
╷
│ Error: doesn't support update
│
│   with module.appname-instance-template.google_compute_instance_template.tpl,
│   on .terraform/modules/appname-instance-template/modules/instance_template/main.tf line 61, in resource "google_compute_instance_template" "tpl":
│   61: resource "google_compute_instance_template" "tpl" {
│

Terraform Configuration

module "appname-instance-template" {
  source = "terraform-google-modules/vm/google//modules/instance_template"
  # TODO: version 8.0.0 breaks trying to add stack_type = "IPV4_ONLY" to an existing template
  version = "8.0.0"
  # insert the 3 required variables here
  project_id = var.project_id
  region     = var.region
  service_account = {
    email  = data.terraform_remote_state.global.outputs.service-accounts.service_accounts_map.single-account.email
    scopes = ["cloud-platform"]
  }
  ###
  subnetwork           = module.gcp-network.subnets["${var.region}/main"].name
  tags                 = ["allow-from-bastion", "appname"]
  machine_type         = "e2-small"
  source_image_project = var.project_id
  source_image_family  = var.appname_base_image
  auto_delete          = true
  disk_size_gb         = 10
  name_prefix          = "${var.env_prefix}appname"
  preemptible          = false
}

### Terraform Version

```sh
$ terraform version
Terraform v1.3.3
on darwin_amd64
+ provider registry.terraform.io/hashicorp/google v4.50.0
+ provider registry.terraform.io/hashicorp/google-beta v4.50.0
+ provider registry.terraform.io/hashicorp/kubernetes v2.17.0
+ provider registry.terraform.io/hashicorp/random v3.4.3
+ provider registry.terraform.io/hashicorp/tls v4.0.4

Your version of Terraform is out of date! The latest version
is 1.3.7. You can update by downloading from https://www.terraform.io/downloads.html

### Additional information

_No response_