k8s-config-connector: Can not refer to managed cert in ComputeSSLCertificate

Describe the bug

When creating a ComputeSSLCertificate there is no way to specify a domain-name so that I can get a manage certificate.

It is possible to declare a domain that should get a managed certificate in the REST documentation

  "managed": {
    "domains": [
      string
    ],
    "status": enum,
    "domainStatus": {
      object
    }
  },

and go to a shop to buy a domain name SSL certificate is unrealistic 5 years after LetsEncrypt.

ConfigConnector Version

1.9.2

To Reproduce Steps to reproduce the behavior:

YAML snippets:

apiVersion: compute.cnrm.cloud.google.com/v1beta1
kind: ComputeSSLCertificate
metadata:
  name: my-domain-cert
spec:
  location: global

It would be good to be able to refer to a DNSRecordSet or a DNSManagedZone CR.