doc(anta.tests): Update logging tests docstrings for clarity

[carl-baillargeon]

Description

Update:

• VerifyLoggingTimestamp
• VerifyLoggingHostname
• VerifyLoggingLogsGeneration

To specify that the tests will work only when EOS is configured with logging buffer secerity level info or higher.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)

[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

[codspeed-hq]

CodSpeed Performance Report

Merging #923 will not alter performance

_{Comparing carl-baillargeon:fix/veirfy_logging_timestamp_docstring (e82f52f) with main (634b1ec)}

Summary

✅ 8 untouched benchmarks