Use identifiers and labels for `Tabs` and `SegmentedSwitch` buttons

[PavelHolec]

To enable proper accessibility of content inside these components, we should:

Solution 1 (simpler, not accurate):

• mark content with isButton trait
• hide button layer from accessibility
• Blocker: The trait isSelected needs to be propagated to correct content

Solution 2 (complicated, accurate):

• add preference keys for content that include accessibilityIdentifier and textLabel
• use these keys when creating buttons to assign them IDs and labels
• hide content layer from accessibility
• active button keeps isSelected trait