I don't know about your JOBI.NOTIFICATION.PROCESS but I guess it is the include for a CALL object and does a PUT_ATT on ATTACH_REPORTS_RUNID. This way there is - as far as I know - no possibility to select what kind of reports will be attached. All will be considered.
What you could do however is to extract the report of the job on your own (PREP_PROCESS_REPORT), write it into a file and use the CALL objects' ATTACH_FILE mechanism to attach that file instead. This will require you to change objects & develop some code however.