District shapes and geounit shapes do not line up

[tgilcrest]

Description

The boundaries for our districts don't line up with the geounit boundaries in some locations. This seems to only become visible when near the max zoom level and dealing with blocks and mostly minor, but we should try to make them line up correctly.

Steps To Reproduce

1. Go to a map
2. Draw a district
3. Zoom into the block level and turn on blocks
4. Look around the edges of the district shape

Expected behavior

The district edges always align with the geounit shapes

Actual behavior

In some places the district boundary doesn't line up with the boundaries of the geounit and can color parts that shouldn't have color (and vice versa)

Screenshots

Additional context

After some conversation with @maurizi and @kshepard it seems that we might be able to decrease the simplification for just the highest zoom level vector tiles.