[no gbp] Reduces click cooldown of more primarily player-controlled mobs (#78686)

## About The Pull Request

Fixes #78679
We made a change to synchronise mob attack speed when controlled by
players and when controlled by AI but this ended up reducing the attack
speed of a few mobs which are primarily controlled by players. This
wasn't meant to be a balance change, so we should revert it for those
mobs.
People can use it as a balance lever later if they want (preferably
after Swing Combat is merged).

## Changelog

🆑
fix: Spiders, Morphs, Fire Sharks, and Regal Rats no longer have a
reduced click speed.
/🆑

code/modules/mob/living/basic/heretic/heretic_summon.dm

@@ -13,6 +13,7 @@
 	unsuitable_heat_damage = 0
 	damage_coeff = list(BRUTE = 1, BURN = 1, TOX = 0, CLONE = 0, STAMINA = 0, OXY = 0)
 	speed = 0
+	melee_attack_cooldown = CLICK_CD_MELEE
 
 	attack_sound = 'sound/weapons/punch1.ogg'
 	response_help_continuous = "thinks better of touching"