test(react-tags): add hook regression tests for Tag family

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Stack

This PR is part of a 3-PR stack. Review and merge bottom-up:

1. feat(react-tags): decouple useTagGroupBase_unstable from Tabster + export contexts #36228 — feat(react-tags): decouple useTagGroupBase_unstable from Tabster + export contexts (base: master) — merge first
2. 👉 test(react-tags): add hook regression tests for Tag family #36229 — test(react-tags): add hook regression tests for Tag family (base: feat(react-tags): decouple useTagGroupBase_unstable from Tabster + export contexts #36228) — depends on feat(react-tags): decouple useTagGroupBase_unstable from Tabster + export contexts #36228
3. feat(react-headless-components-preview): add Tag family #36230 — feat(react-headless-components-preview): add Tag family (base: test(react-tags): add hook regression tests for Tag family #36229) — merge last; depends on test(react-tags): add hook regression tests for Tag family #36229

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Summary

Adds renderHook-based regression tests for the Tag, InteractionTag, InteractionTagPrimary, InteractionTagSecondary, and TagGroup base + styled hooks. Locks in the public output shape so subsequent base-hook refactors (such as the Tabster decoupling in #36228) cannot silently regress the styled hooks.

Coverage highlights:

• Slot element type via root.type (button vs span), event-handler presence/absence
• Default DismissRegular injection happens only in the styled hooks (useTag_unstable, useInteractionTagSecondary_unstable), never in the base hooks
• Context inheritance for appearance / size from TagGroupContext
• Context override for disabled (group overrides tag prop)
• New UseTagGroupBaseOptions contract: arrowNavigationProps is spread onto root, onAfterTagDismiss is invoked after a dismiss; both default to no-op
• ARIA: aria-selected (listbox), aria-pressed (default), aria-labelledby (InteractionTagSecondary)

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