bbl v9.0.0 fails in combination with the network-lb-gcp plan patch

[tjvman]

We use bbl both directly and via cf-deployment-concourse-tasks, and we're seeing the following failure when running bbl plan:

$ bbl plan --debug --lb-type=cf --lb-cert=certs/load-balancer/server.crt --lb-key=certs/load-balancer/server.key --lb-domain=<our domain>
There are some problems with the configuration, described below.

The Terraform configuration must be valid before initialization so that
Terraform can determine which modules and providers need to be installed.
╷
│ Error: Missing resource to override
│ 
│   on network_lb_override.tf line 5:
│    5: resource "google_compute_address" "cf-address" {
│ 
│ There is no google_compute_address resource named "cf-address". An override
│ file can only override a resource block defined in a primary configuration
│ file.
╵

╷
│ Error: Missing resource to override
│ 
│   on network_lb_override.tf line 13:
│   13: resource "google_compute_forwarding_rule" "cf-http-forwarding-rule" {
│ 
│ There is no google_compute_forwarding_rule resource named
│ "cf-http-forwarding-rule". An override file can only override a resource
│ block defined in a primary configuration file.
╵

╷
│ Error: Missing resource to override
│ 
│   on network_lb_override.tf line 25:
│   25: resource "google_compute_forwarding_rule" "cf-https-forwarding-rule" {
│ 
│ There is no google_compute_forwarding_rule resource named
│ "cf-https-forwarding-rule". An override file can only override a resource
│ block defined in a primary configuration file.
╵

╷
│ Error: Missing resource to override
│ 
│   on network_lb_override.tf line 57:
│   57: resource "google_compute_target_pool" "router-lb-target-pool" {
│ 
│ There is no google_compute_target_pool resource named
│ "router-lb-target-pool". An override file can only override a resource
│ block defined in a primary configuration file.
╵

╷
│ Error: Unsupported override
│ 
│   on network_lb_override.tf line 67, in resource "google_compute_firewall" "cf-health-check":
│   67:   depends_on = ["google_compute_network.bbl-network"]
│ 
│ The depends_on argument may not be overridden.
╵

╷
│ Error: Unsupported override
│ 
│   on network_lb_override.tf line 81, in resource "google_compute_firewall" "firewall-cf":
│   81:   depends_on = ["google_compute_network.bbl-network"]
│ 
│ The depends_on argument may not be overridden.
╵

╷
│ Error: Unsupported override
│ 
│   on network_lb_override.tf line 96, in resource "google_dns_record_set" "wildcard-dns":
│   96:   depends_on = ["google_compute_address.cf-address"]
│ 
│ The depends_on argument may not be overridden.
╵

╷
│ Error: Missing base output definition to override
│ 
│   on network_lb_override.tf line 110:
│  110: output "router_target_pool" {
│ 
│ There is no output named "router_target_pool". An override file can only
│ override an output that was already defined in a primary configuration
│ file.
╵

This seems to be caused by the terraform upgrade, and may be similar to https://github.com/cloudfoundry/bosh-bootloader/issues/559.