Fix of Egamma monitoring and validation jobs
This is a final fix for ATR-17247. Am adding more logging info in the python configuration and fixed by:
- Removing TrigEgammaMonTool from ToolSvc (provoking Can not append TrigEgammaMonTool (Public AlgTool) to a PrivateToolHandleArray)
- Adding instance of LH tool for the HI medium selection.