Prevents psiren omens, beckoners and the matriarch from being summoned (#23055)

Done on behalf of @VMSolidus. The reasoning is that the morale damage of
the omens and beckoners is balanced around there only being a couple,
while the gold slime core and the technomancer could spawn enough to
tank everyones morale damage to the ground. The matriarch was removed
from the gold slime core as an unintended spawn, due to its strength.

code/game/gamemodes/technomancer/spells/summon/summon_creature.dm

@@ -36,9 +36,7 @@
 		"CARP"					=	/mob/living/simple_animal/hostile/carp,
 		"BEAR"					=	/mob/living/simple_animal/hostile/bear,
 		"PSIREN LASHER" 		=	/mob/living/simple_animal/hostile/psiren,
-		"PSIREN DARTER"			= 	/mob/living/simple_animal/hostile/psiren/ranged,
-		"PSIREN OMEN"			=	/mob/living/simple_animal/hostile/psiren/omen,
-		"PSIREN BECKONER"		=	/mob/living/simple_animal/hostile/psiren/omen/beckoner,
+		"PSIREN DARTER"			= 	/mob/living/simple_animal/hostile/psiren/ranged
 		)
 	cooldown = 30
 	instability_cost = 10

code/modules/reagents/Chemistry-Recipes.dm

@@ -1271,7 +1271,10 @@
 		/mob/living/simple_animal/hostile/mimic,
 		/mob/living/simple_animal/hostile/cavern_geist,
 		/mob/living/simple_animal/hostile/cavern_geist/augmented,
-		/mob/living/simple_animal/hostile/retaliate/pra_exploration_drone
+		/mob/living/simple_animal/hostile/retaliate/pra_exploration_drone,
+		/mob/living/simple_animal/hostile/psiren/omen,
+		/mob/living/simple_animal/hostile/psiren/omen/beckoner,
+		/mob/living/simple_animal/hostile/psiren/matriarch
 	)
 
 	var/list/critters = typesof(/mob/living/simple_animal/hostile) - blocked // list of possible hostile mobs

html/changelogs/PsirenCalling.yml

@@ -0,0 +1,7 @@
+author: TheGreyWolf
+
+delete-after: True
+
+changes:
+  - rscdel: "The golden slime core can no longer spawn psiren omens, beckoners or the psiren matriarch."
+  - rscdel: "Technomancers can no longer summon the psiren omens or beckoners. Other psirens were untouched."