[Hotfix] A Lot of Borer Fixes

Created by: Shadowmech88

A bone sword and a fleshshot on the same arm was never meant to happen. Nor was being able to attack with a wielded fireaxe at range.

Fixes runtime. Fixes multiple borers being able to inhabit the same limb. Fixes being able to use the extend-o-arm to attack with a two-handed weapon that the host is currently wielding. Updates attack verbs of bone weapons. Removes the visible_message that appears when the fleshshot is fired. Fixes borers being able to pick up anchored items. Fixes #10599 (closed) (Fixes the blood secretion, at least. I'm confident that the lipozine issue is not specifically related to borers.)