Hellos is there a sample of how to enable multi-stage query with helm based installation for pinot release version 0.12.1

@abhinav wagle This document might be helpful (https://docs.pinot.apache.org/developers/advanced/v2-multi-stage-query-engine#how-to-enable-the-multi-stage-query-engine). Basically we need to set additional params for Cluster Configuration and restart the dependent components

Thanks @Jayesh Asrani