[CLOSED PR] Security health implants only send out an alert on death.

[Ikea]

I forgot to mention this, but for clarification, the normal health implants dont send a message to security. If you take a normal health implant as well as a security health implant, only medical will be alerted when you reach crit. I dont think theres an issue currently of medics rushing to save sec offs being killed by antags so sec offs doing so doesnt really effect what this pr is trying to change.