[google_maps] Add AdvancedMarkerElement to resolve deprecation

[Imma76]

I keep getting this warming when I build for web.

As of February 21st, 2024, google.maps.Marker is deprecated. Please use google.maps.marker.AdvancedMarkerElement instead. At this time, google.maps.Marker is not scheduled to be discontinued, but google.maps.marker.AdvancedMarkerElement is recommended over google.maps.Marker. While google.maps.Marker will continue to receive bug fixes for any major regressions, existing bugs in google.maps.Marker will not be addressed. At least 12 months notice will be given before support is discontinued. Please see https://developers.google.com/maps/deprecations for additional details and https://developers.google.com/maps/documentation/javascript/advanced-markers/migration for the migration guide.

[a14n]

I started working on a new version but it is a full rewrite and will take some time to land.

[a14n]

Should be usable in google_maps-8.0.0