Support for transition for data-driven properties

[EmmaSimon]

Environment

• Xcode version: 15.3
• iOS version: 17.4
• Devices affected: iPhone 15 Pro
• Maps SDK Version: 11.1.0

Observed behavior and steps to reproduce

Transitions don't seem to function at all when layer properties are set using expressions rather than constant values.

var layer = SymbolLayer(id: layerId, source: sourceId)
layer.iconImage = "icon"
layer.iconOpacity = .expression(Exp(.step) {
    Exp(.zoom)
    0
    15
    1
})
layer.iconOpacityTransition = StyleTransition(duration: 1, delay: 0)

Expected behavior

I'd expect the opacity to fade in and out when zooming past the specified zoom level. The transition works properly if you use an onCameraChanged listener and set the value to a constant instead.

Notes / preliminary analysis

This may be related to similar issues in mapbox-gl-js and rnmapbox.