keep PMT waveforms in stage and add fcl to drop them later#835

leoaliaga merged 2 commits intoSBNSoftware:release/SBN2025ASBNSoftware/icaruscode:release/SBN2025Afrom

cerati:feature/cerati_PMTwaveformscerati/icaruscode:feature/cerati_PMTwaveformsCopy head branch name to clipboard