Partial event building based on RoIs
This is basically a rewrite of the old TrigROBListWriter from the obsolete package TrigDetCalib. The new version in the AthenaMT package TrigPartialEventBuilding is called RoIPEBInfoWriterTool. It's an implementation of PEBInfoWriterToolBase which writes PEBInfo with a list of ROBs in the input RoI.
So far this provides the basic RoI-based PEB functionality and two example chains are added in the PEB test in TrigUpgradeTest for this.
Jira: ATR-19360