Remove log.generate.short from commit if external LHE is used

Description of bug

hen external LHE files are used log.generate.short is added to the commit but run_athena just skips the job without producing any log.generate_ci file. Then the check_logParser job thinks this is a bug because if log.generate.short is present log.generate_ci should also be present as well at this point in the CI and complains see !652 (merged)

Changes introduced

During check_logParser CI job check if the log.generate.short file contains inputGeneratorFile and if so just git rm the log.generate.short and continue

Tests

Successfull test here: inputGeneratorFile https://gitlab.cern.ch/atlas-physics/pmg/mcjoboptions/-/jobs/9887763 based on the problematic jO from !652 (merged)

Issues resolved

Closes #122 (closed)