[MIRROR] Removes friendly fire from space dragon [MDB IGNORE] (#18998)

Removes friendly fire from space dragon (#72990)

## About The Pull Request

Space dragon fire breath no longer oneshots allied space carps, now it
doesn't damage them at all. Carps that aren't dragon minions are
unaffected.

Closes https://github.com/tgstation/tgstation/issues/72985

## Why It's Good For The Game

It is fun to play as a dragon's carp minion, but it is very hard to
normally work in a team with the dragon due to the fact that dragon's
fire breath oneshots you. This PR makes playing as a dragon's carp more
sane and allows carps to actually defend the carp rifts as they should,
while not being instakilled by their master.

## Changelog
🆑
balance: Space dragon fire breath no longer damages allied space carps
/🆑

---------

Co-authored-by: SuperSlayer <91609255+SuperSlayer0@users.noreply.github.com>
Co-authored-by: ShizCalev <ShizCalev@users.noreply.github.com>
Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>

code/modules/mob/living/simple_animal/hostile/space_dragon.dm

@@ -306,6 +306,8 @@
 	for(var/mob/living/L in T.contents)
 		if(L in hit_list)
 			continue
+		if(L.mind?.has_antag_datum(/datum/antagonist/space_carp))
+			continue
 		hit_list += L
 		L.adjustFireLoss(30)
 		to_chat(L, span_userdanger("You're hit by [src]'s fire breath!"))