* Add note for indentation cleanup
* Converted tabs to spaces in various Python scripts to match PEP 8 indentation.
With the help of AI-Agent: Codex, Google Gemini Code review
Thanks to Michael Biebl for his help on this issue.
This patch also contains some slight test modernization and
a "name fix" for a non-valgrind test.
closes https://github.com/rsyslog/rsyslog/issues/3853