rename Image to MBXImage in swift and remove experimental mark (#11163)

This will allow to use Image type in stable apis in swift.

Addresses https://mapbox.atlassian.net/browse/MAPSIOS-2086

cc @mapbox/maps-android
cc @mapbox/maps-ios
cc @mapbox/gl-native

GitOrigin-RevId: 244f35f40405bc012534c23d49447dd73afe240a

Author: evil159

Sources/MapboxMaps/Documentation.docc/API Catalogs/CoreMapsInternal.md

@@ -13,6 +13,7 @@ Maps rendering SDK also known as GL-Native. These are for internal use only.
 - ``RequestErrorType``
 - ``EdgeInsets``
 - ``ScreenCoordinate``
+- ``MBXImage``
 
 <!-- functions -->
 - ``MBMMapLoadingErrorTypeToString(_:)``

Sources/MapboxMaps/Foundation/CoreAliases.swift

@@ -20,7 +20,7 @@ typealias CoreScreenCoordinate = MapboxCoreMaps_Private.__ScreenCoordinate
 typealias CoreScreenBox = MapboxCoreMaps_Private.ScreenBox
 typealias CoreEdgeInsets = MapboxCoreMaps_Private.__EdgeInsets
 typealias CoreTileCoverOptions = MapboxCoreMaps_Private.TileCoverOptions
-typealias CoreMapsImage = MapboxCoreMaps_Private.__Image
+typealias CoreMapsImage = MapboxCoreMaps_Private.__MBXImage
 typealias CoreCustomRasterSourceTileData = MapboxCoreMaps_Private.CustomRasterSourceTileData
 typealias CoreStyleManager = MapboxCoreMaps_Private.StyleManager
 typealias CoreGeoJSONSourceData = MapboxCoreMaps_Private.GeoJSONSourceData