chore(iOS, Tabs): migrate to UITab API on iOS 26+

[kkafar]

Description

Changes

Before & after - visual documentation

Test plan

Checklist

• Included code example that can be used to test this change.
• For visual changes, included screenshots / GIFs / recordings documenting the change.
• For API changes, updated relevant public types.
• Ensured that CI passes

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[kkafar]

This was a PoC thats continued in #4675