Clustering: Add the ability to customize the Marker InfoWindow on Marker click

For what I understand there is no actual way to customize the InfoWindow of a marker that is part of the cluster, like in [here](https://github.com/googlemaps/android-maps-compose/blob/main/app/src/main/java/com/google/maps/android/compose/MapClusteringActivity.kt#L102) using the "content" parameter of MarkerInfoWindow when the Marker is clicked, the problem is that the Marker of the example is a non-clustered Marker
.