Batch addition of geometries in non-empty topology

[strk]

Spin off of #5667, this ticket is to implement functions to add batches of geometries to an existing and not necessarely empty topology.

For the empty case we already have ST_CreateTopoGeo. This ticket is to allow doing it in a non-empty one.

There is already a not-implemented signature TopoGeo_addGeometry which we may use for this.

[strk]

I've found this is a duplication of #2862