[MAP]Minor Map Changes/Assistant Spawns

Reupload due to merging conflicts with the last PR.

Nothing has changed since my last update from the prior PR here: https://github.com/tgstation/-tg-station/pull/4881

Detective's SecHUD's were removed as requested, in addition the Gulag Securitron was moved back to the Gulag. I will revisit those ideas at a, far, later date.