[TrigServices,TrigSteeringEvent] Handle missing CTP fragment as event processing error

Rafal Bielskirequested to merge
rbielski/athena:missing-ctp-frag-handling into 22.0

Don't treat missing CTP fragments as "framework" errors and instead treat them as "event" errors. In particular, do not abort the event loop after N occurrences of a missing CTP fragment and just always continue to the next event.

A helper function is added in OnlineErrorCode.h to differentiate between "framework" and "event" error codes.

Closes ATR-25217

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