TrigT1CaloCalibTools: replace accessor with ReadDecorHandle in TriggerTowerThinningAlg
Hello,
This MR is introducing a ReadDecorHandleKey in TriggerTowerThinningAlg to ensure that the decoration is created in L1CaloTriggerTowerDecoratorAlg (!57693 (merged)) before it is accessed in TriggerTowerThinningAlg. Fixes ATR-25979.
Tagging @ssnyder and @christos for a second look.
Cheers, Bertrand