Fixes #4816 + more

Fixes #4816 (or attempts to)
Creates proper instances of areas in engineering to prevent issues with APCs.
Removes one of the two APCs in the medbay sleeper area.

Bonus material:
Corrects a few more places where atmosphere alarms would lower shutters in adjacent but otherwise unrelated rooms.
Adds a camera at the virology entrance to remove a tiny strip of missing coverage that prevented AI from assisting people in and out from viro (perhaps intended however?).