fix(scripts): correct jq JSON path selector in delete_demo_actors

Update the actor listing query in `hack/install-ate.sh` to extract `metadata.atespace` and `metadata.name` instead of the legacy root fields `atespace` and `actorId`.

`metadata` was introduced in af1f005

Author: laoj2

hack/install-ate.sh

@@ -465,7 +465,7 @@ delete_demo_actors() {
       run_kubectl_ate delete actor "${actor_id}" -a "${atespace}"
     done < <(
       jq -r --arg ns "${ns}" --arg tmpl "${tmpl}" \
-        '.actors[]? | select(.actorTemplateNamespace == $ns and .actorTemplateName == $tmpl) | "\(.atespace)\t\(.actorId)"' \
+        '.actors[]? | select(.actorTemplateNamespace == $ns and .actorTemplateName == $tmpl) | "\(.metadata.atespace)\t\(.metadata.name)"' \
         <<<"${actors_json}"
     )
   done