[docs][winlogbeat] - convert remaining docs to markdown

[VihasMakwana]

Proposed commit message

This is a follow-up of #44638.
This PR converts remaining winlogbeat docs to markdown and resolves a TODO.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

How to test this PR

• Head to docs-preview and verify the auditbeat docs

Related issues

• Relates Update Beats code to support new Markdown documentation #43008

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[github-actions]

🤖 GitHub comments

Expand to view the GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

Pinging @elastic/sec-windows-platform (Team:Security-Windows Platform)

[pierrehilbert]

cc @nfritts