Medbots treat brute with tricord again to stop overdoses

Created by: SarahJohnson489

Back in https://github.com/d3athrow/vgstation13/pull/9275 medbots gained the ability to dispense a specialized chem based on the medkit it was made out of. So an O2 kit medbot would treat oxyloss with Dexalin instead of Tricord. Tox with Antitox. Fire with kelotane. Regular with bicard. The problem with that being that Bicard OD's at 30u and medbots inject with 15u at default making it easy to OD yourself if all 3 of the robotics medbots or a cluster of medbots from other sources get made and are close enough to inject someone all at once for brute damage. PR changes that back to Tricord.

Tested locally. Sandbox spawned medbots worked fine. Built 3 in robotics and they injected tricord for brute successfully as well.