Add Trigger flag to disable CPS
Add the flag ConfigFlags.Trigger.disableCPS to disable Consistent Prescale Sets globally. It works by removing the CPS groups from the chain definitions during menu generation. IIUC, this was @khoo's idea in ATR-24744.
Make use of this flag in the TrigInDetValidation tests, adding it to the Trigger step preExec by default.
Fixes ATR-24744 and fixes ATR-24761 which is the same issue.