Npc infestation: growing spawns of npcs

Closes: #357

This PR... is a lot

It builds on the RandomSpawningExpiringPresence which determines random spawn locations for static spawns
Provides another subclass GrowingPresence with a state that increments levels and selects new npcs from the npcescalations table (see DB PR) Requires: from OPDB/Gamma branch https://github.com/OpenPerpetuum/OPDB/tree/GAMMA
```
Staging_Dev/10_npcEscalations_createtable_col__2021_09_18.sql
Staging_Dev/11_insert_npcdefs_npcturrets__2021_09_18.sql
Staging_Dev/12_insert_npcpres_flocks_waves_npcbases__2021_09_18.sql
```
Or just 10, and you can build your own presences with type=12

But things the team wants still:

Respawning at non-initial states/levels ✔️
To only respawn in non-redzone tiles (spawn state to check this) ✔️
Respawning delay and lifetime to have random noise for their scheduling ✔️
~~NPC definitions that if present, can alter/create a zone effect (TODO: make separate issue)~~ #392
NPC definitions that if present, players can not place PBS structures nearby (at least terminals) (radius TBD) ✔️

OpenPerpetuum / PerpetuumServer