centos-cloud/centos-7 images are not available anymore

Multiple TF files deploy centos-7 VMs, which don't deploy. Example:

```
google_compute_instance.license-server: Creating...
╷
│ Error: Error resolving image name 'centos-cloud/centos-7': Could not find image or family centos-cloud/centos-7
│
│ with google_compute_instance.license-server,
│ on main.tf line 21, in resource "google_compute_instance" "license-server":
│ 21: resource "google_compute_instance" "license-server" {
│
```

Why? centos-7 is not available on Google Cloud anymore. Too old.
https://cloud.google.com/compute/docs/images/os-details#centos

It affects the following files:

```
terraform/licensing/main.tf: license_server_os_image = "centos-cloud/centos-7"
terraform/standalone-compute/main.tf: master_os_image = "centos-cloud/centos-7"
third_party/slurm-gcp/tf/modules/controller/main.tf: image = "centos-cloud/centos-7"
third_party/slurm-gcp/tf/modules/compute/main.tf: image = "centos-cloud/centos-7"
third_party/slurm-gcp/tf/modules/login/main.tf: image = "centos-cloud/centos-7"
```

I tried to use `centos-cloud/centos-stream-9` and `rocky-linux-cloud/rocky-linux-8-optimized-gcp` instead. VMs deploy, but the startup script at https://github.com/GoogleCloudPlatform/eda-examples/blob/main/third_party/slurm-gcp/scripts/startup.sh hangs, because it insists on installing yum packages which aren't available on the newer distributions anymore:

```
startup-script: Error: Unable to find a match: lua-devel man2html mariadb-devel munge-devel rrdtool-devel pdsh
```

Am I doing something very wrong, or can this repo not be deployed anymore?