Add image type to mapbox-gl (#48589)
Add image type to mapbox-gl (#48589)

Mapbox-gl image expression doc: https://docs.mapbox.com/mapbox-gl-js/style-spec/expressions/#types-image
georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped