TrigDecisionTool: add isPassedForEach to ChainGroup
Add isPassedForEach function to ChainGroup to allow the retrieval of
the trigger decision of each chain in the group. Also optimize the
isPassed function to return at the first passing chain instead of
continuing to loop over all chains.
Make use of this new interface in TrigHLTMonitoring and delete some obsolete test defitinions.
Closes ATR-26331.
Edited by Frank Winklmeier