[FIX] point_of_sale: Avoid transaction aborted errors when handling failed orders #27932
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POSSession._handle_order_process_fail is usally called on any Exceptions, also on DB-related exception which may abort the current transaction.
In this case, the call to _is_capture_system_activated raises with an TransactionAborted Error, which shadows the real traceback of the original
Exception.
This PR moves the Rollback to the top of the Method.
This is safe as the caller raises anyway.