[TrigPSC,TrigServices] Set a few default flags before parsing any python configuration
Set a few default flags in the HLT online python configuration wrapper TrigPSCPythonSetup.py
which are required to generate a correct core services configuration before parsing any input job options file. Pass these flags to the setupCommonServices
function.
Up to now we used to set only athenaCommonFlags.isOnline
and the rest worked by chance until !53852 (merged) which relied on a flag we've not been setting.
Fixes ATR-25661