Scripts/Ulduar: Fix Kologarn's arms being despawned before they're used to access the rubble spawning triggers

(cherry picked from commit 4c93ac74da81eeb5af27320777b64d347050f8e2)
Scripts/Ulduar: Fix Ignis' golems not shattering in 25m

Closes #10519

(cherry picked from commit 60493b3057034833dc24674d688eae9bf3d77505)