Scripts/Kologarn: Apply CREATURE_FLAG_EXTRA_NO_COMBAT on NPC_ARM_SWEEP_STALKER and NPC_RUBBLE_STALKER

(cherry picked from commit 6ad6d9e670)

sql/updates/world/master/2022_01_26_09_world_2020_08_05_01_world.sql

@@ -0,0 +1,2 @@
+-- Add CREATURE_FLAG_EXTRA_NO_COMBAT to Kologarn's stalkers
+UPDATE `creature_template` SET `flags_extra` = `flags_extra` | 0x00002000 WHERE `entry` IN (33661,33809,33942);

src/server/scripts/Northrend/Ulduar/Ulduar/boss_kologarn.cpp

@@ -150,7 +150,6 @@ class boss_kologarn : public CreatureScript
                 me->GetMotionMaster()->MoveTargetedHome();
                 me->AddUnitFlag(UNIT_FLAG_NOT_SELECTABLE);
                 me->SetCorpseDelay(604800); // Prevent corpse from despawning.
-                ForceCombatStopForCreatureEntry({ NPC_ARM_SWEEP_STALKER, NPC_RUBBLE_STALKER }, 500.f);
                 _JustDied();
             }