[Tile-serving] [openstreetmap/osm2pgsql] Use libosmium for geometry building (#684)

[Sarah Hoffmann]

Performance numbers for a planet import on a 32GB RAM machine with SSDs (-C 24000 --drop -s):

PR
```
Processing: Node(3467864k 5376.5k/s) Way(361033k 31.52k/s) Relation(4392840 337.86/s)  parse time: 25102s
Node stats: total(3467864331), max(4318974389) in 645s
Way stats: total(361033871), max(432971616) in 11455s
Relation stats: total(4393429), max(6435395) in 13002s
Finished processing 244505022 ways in 7390 s
```

master 
```
Processing: Node(3467864k 4051.2k/s) Way(361033k 25.98k/s) Relation(4393000 254.80/s)  parse time: 31992s
Node stats: total(3467864331), max(4318974389) in 856s
Way stats: total(361033871), max(432971616) in 13894s
Relation stats: total(4393429), max(6435395) in 17242s
Finished processing 244505051 ways in 10367 s
```

The PR database has about 66k polygons less coming from about 20k objects. Summing up the areas of all polygons, there is about 1% less. So as suspected, there are in particular large areas missing.

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