Trim overzoom features from tiles where they're not needed

[tgrigsby-sc]

In order to support overzooming, we leave features in tiles with zoom max_zoom_with_changes whose min_zoom is greater. This is fine, except, because of the nature of the way we build metatiles, we also include them in the size before that, which corresponds to zoom max_zoom_with_changes - 1. These features will never be used or needed in these tiles.

This change detects this scenario, we're building a coordinate that is below nominal_zoom AND nominal_zoom equals max_zoom_with_changes, and then removes the features we were only leaving in to support overzoom, which is anything where properties["min_zoom"] >= nominal_zoom +1

[nvkelso]

Reviewing output MVTs this matches my expectations.

[iandees]

The logic makes sense 👍🏻 but the different zooms still confuse me.