remove vtm roads queries

The vtm roads queries were exactly the same as the others.
add indexes to speed up planet_osm_polygon queries
use land polygons query for earth-z9+

The ne 50m dataset didn't look good at this zoom level. Using the land
polygons dataset at this zoom level seemed to be fast enough.
remove the where clause in the earth queries

The where clause wasn't actually improving performance.
add zoom level 9 geometry for water areas view
adjust roads view zoom levels and data fidelity
consolidate multiple building way columns into one
consolidate land use geometries
remove no longer relevant simplify_until config
add "AS" for consistentcy
simplify buildings at zoom 14 separately

We want to bump the area back to 100 for zoom level 14. The
simplification at zoom level 14 as well is to improve its speed.
sql function to better tolerate bad height data
make post-import sql idempotent

Ensure that it's safe to re-run the post-import sql. This would be how
the materialized views would get refreshed without down time.