private Set<ClusterSpec.Id> intersect(Set<ClusterSpec.Id> a, Set<ClusterSpec.Id> b) {
        Set<ClusterSpec.Id> result = new HashSet<>(a);
        result.retainAll(b);
        return result;
    }
If using local LLMs, this validator will make sure that restartOnDeploy is set for
configs for this cluster.

@author lesters
config-model/src/main/java/com/yahoo/vespa/model/application/validation/change/RestartOnDeployForLocalLLMValidator.java