improve win32_event_log docs

[ian28223]

What does this PR do?

Updates the documentation to make it clear that config under instances: (collected as DD Events) are mutually exclusive to config under logs: (collected as DD Logs)

Motivation

Users often confuse the 2 thinking both configs are needed or certain filter parameters get mixed in irrelevant sections of the configuration.

Additional Notes

• Not sure how to preview the doc with tabs so I was not able to check how this would render

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] PR title must be written as a CHANGELOG entry (see why)
• [ ] Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• [ ] PR must have changelog/ and integration/ labels attached

[github-actions[bot]]

The validations job has failed; please review the Files changed tab for possible suggestions to resolve.

[github-actions[bot]]

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[hestonhoffman]

I've opened an editorial review card for this one here.

[FlorentClarret]

@ian28223 you'll need to merge master into this branch or rebase to fix the CI

[ian28223]

Rebased and resolved conflicts. Kindly re-review 🙇