PromLab - Subqueries are not available

[aurrelhebert]

Based on PromLab PromQL compliance tests (https://promlabs.com/promql-compliance-tests), erlenmeyer doesn't support PromQL subqueries as the PromQL parser version is outdated:

QUERY: max_over_time((time() - max(demo_batch_last_success_timestamp_seconds) < 1000)[5m:10s] offset 5m)
QUERY: avg_over_time(rate(demo_cpu_usage_seconds_total[1m])[2m:10s])