in_winevtlog: Plug glitches of time offset for DST/STD switches [Backport to 4.1]

[cosmo0920]

Backporting of #11291.

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Backporting

• Backport to latest stable release.

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✨ Finishing touches

🧪 Generate unit tests (beta)

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• Commit unit tests in branch cosmo0920-plug-tz-offset-glitches-4.1

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