add MR title flag mechanism for allowing regressions

    -   *apply-testv-scaling

    - fi

    # check MR title for flag that allows regressions to be mergable

    - echo $CI_MERGE_REQUEST_TITLE > tmp.txt

    - allow_regressions_flag=$(grep -c --ignore-case "\[allow[ -]*regression\]" tmp.txt) || true

    ### run branch first

    # this per default builds the branch and the reference and creates the reference outputs

    - *build-and-create-reference-outputs

    - regressions_found=0

    - python3 scripts/basop_check_for_changes_in_testcases.py $CSV_BRANCH $CSV_MAIN || regressions_found=$?

    - if [ $regressions_found != 0 ]; then echo "Detected regression wrt to main!"; exit $EXIT_CODE_FAIL; fi

    - if [ $zero_errors_branch != 1 ]; then echo "Run errors encountered!"; exit $EXIT_CODE_FAIL; fi

    - if [ $regressions_found != 0 ]; then

    -    echo "Detected regression wrt to main!"

    -    if [ $allow_regressions_flag == 0 ]; then

    -        exit $EXIT_CODE_FAIL;

    -    else

    -        exit $EXIT_CODE_NON_BE;

    -    fi

    - fi

    - if [ $zero_errors_branch != 1 ]; then echo "Run errors encountered!"; exit $EXIT_CODE_NON_BE; fi

    - if [ $exit_code -eq 1 ]; then echo "Differences encountered"; exit $EXIT_CODE_NON_BE; fi

    - exit 0

  allow_failure: