fix: test: Fix the log-report-channel zones check

The check looks for logs that are not present, fails to make the
possible failure visible, and fails to bump the check enumerator:

    I:checking that log-report-channel zones fail if '*._er/TXT' is missing (129)
    grep: test.out4.129: No such file or directory
    grep: test.out4.129: No such file or directory
    I:checking that raw zone with bad class is handled (129)

The issue appeared in #3659.

Merge branch 'mnowak/checkzone-test-fix' into 'main'

See merge request isc-projects/bind9!10286