[MIRROR] Fixes Admin Make AI not working on observers [MDB IGNORE] (#19307)

* Fixes Admin Make AI not working on observers (#73353)

## About The Pull Request

Using player panel `make ai` on an observer no longer fails to insert
the player into the created AI.

`ai/Initialize()` does a mind transfer, but observers don't have minds.
Fixes this by moving over any present keys if the player is mindless.

## Why It's Good For The Game

Helps in testing

## Changelog

🆑 Melbert
fix: Fixes player panel "make ai" button not fully working on observers
/🆑

* Fixes Admin Make AI not working on observers

---------

Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>

code/modules/mob/living/silicon/ai/ai.dm

@@ -140,6 +140,8 @@
 			to_chat(src, span_danger("You must obey your silicon laws above all else. Your objectives will consider you to be dead."))
 		if(!mind.has_ever_been_ai)
 			mind.has_ever_been_ai = TRUE
+	else if(target_ai.key)
+		key = target_ai.key
 
 	to_chat(src, "<B>You are playing the station's AI. The AI cannot move, but can interact with many objects while viewing them (through cameras).</B>")
 	to_chat(src, "<B>To look at other parts of the station, click on yourself to get a camera menu.</B>")