Sweeping !55839 from master to 22.0. Overlay: Take MCChannelNumber from secondary input (!55855) · Merge requests · atlas / athena · GitLab

Atlas Nightlybuild requested to merge cherry-pick-9a4c6aa5f11-22.0 into 22.0 Aug 12, 2022

Overlay: Take MCChannelNumber from secondary input

See merge request !55839 (merged)