ec/google/chromeec: Add support for After G3 State, and enable it for FIZZ#21

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movr4x wants to merge 5 commits intoMrChromebox:MrChromebox-2509from

movr4x:MrChromebox-2509-ag3s-up

Commits on Dec 5, 2025

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Commits on Jan 9, 2026

ec/google/chromeec: ag3s: Address issues and rework for simplicity
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