x-pack/winlogbeat: move module tests

[efd6]

What does this PR do?

This moves the top half of the winlogbeat testing into a subdivided namespace to make room for the bottom half that will be coming.

Why is it important?

This is a step in adding ingest node tests for winlogbeat.

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.

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• For [Winlogbeat] add tests for ingest node pipelines #30406

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Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

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Build stats

• Start Time: 2022-06-03T07:58:32.728+0000

• Duration: 59 min 37 sec

Test stats 🧪

Test	Results
Failed	0
Passed	336
Skipped	0
Total	336

💚 Flaky test report

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