Unit tests results should not be displayed in 'automake output' mode

[eduar-hte]

what

Updated unit_tests program to not show individual unit tests results in automake output.

why

Showing individual results breaks the collection of results when a test fails bypassing its detection, which makes make check show incorrect results.

The issue is that the individual test results include escape characters to colorize the output (to show in red that a test failed for example) and this makes the generated .log & .trs file binary, which breaks grep parsing in test/custom-test-driver and the collection of test results from autotest.

NOTE: The issue is not limited to the escape characters to colorize output as there are tests that include binary data in the input & output of the tests, which when display trigger the same issue.

For example, in the context of #3231, if you introduce a bug in the ParityOdd7bit transformation (by switching the inplace template parameter from true to false, which makes it behave like the ParityEven7bit in the new shared implementation), three of the tests should fail. However, if you run the tests with make check, they complete with zero errors! If you look at the output of the execution, though, you can see that there are grep errors:

(...)
(   4/  0/   4): test/test-cases/secrules-language-tests/transformations/parityEven7bit.json
grep: (standard input): binary file matches
grep: (standard input): binary file matches
grep: (standard input): binary file matches
(   0/  0/   0): test/test-cases/secrules-language-tests/transformations/parityOdd7bit.json
(...)
(   7/  0/   7): test/test-cases/secrules-language-tests/transformations/utf8toUnicode.json
grep: test/test-cases/secrules-language-tests/transformations/parityOdd7bit.json.trs: binary file matches
grep: test/test-cases/secrules-language-tests/transformations/parityOdd7bit.json.trs: binary file matches
grep: test/test-cases/secrules-language-tests/transformations/parityOdd7bit.json.trs: binary file matches
============================================================================
Testsuite summary for modsecurity 3.0
============================================================================
# TOTAL: 4956
# PASS:  4918
# SKIP:  38
# XFAIL: 0
# FAIL:  0
# XPASS: 0
# ERROR: 0
============================================================================

misc

Piggyback on this PR to complete update from PR #3229. 🙏

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[airween]

LGTM