Refocus of os types #1257

[thompson-tomo]

Closes #1257

Changes

Deprecate all existing os types and instead use the field to describe the type of the OS ie windows or Unix. The existing types should be the os.name and/or unix.kernel.name with the later handled via #2641

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Merge requirement checklist

• [x] CONTRIBUTING.md guidelines followed.
• [x] Change log entry added, according to the guidelines in When to add a changelog entry.
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• [ ] schema-next.yaml updated with changes to existing conventions.