fix 'Overview of API audit filter' and remove duplicate
The duplicates are:

• audit-filtering.adoc
• logging-audit-log-filtering.adoc

The plan is to:

• remove the duplicate
• ensure no content is lost
• fix asciidoc issues
• make my own "peer review"
• run the module through Vale
• run the module through NotebookLM agains style guides
• run the module through readability test