enable google_compute_instance_group to accept instances id

[edwardmedia]

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Description

New or Affected Resource(s)

• google_compute_instance_group
  The field instances currently only accepts the self_link of instances

Potential Terraform Configuration

resource "google_compute_instance_group" "staging_group" {
  name      = "staging-instance-group"
  zone      = "us-central1-c"
  instances = [google_compute_instance.staging_vm.self_link]  <---- need to accept id
   named_port {
    name = "http"
    port = "8080"
  }

  named_port {
    name = "https"
    port = "8443"
  }

  lifecycle {
    create_before_destroy = true
  }
}

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!