Scripts/ICC: Minor Fixes for Lich King (#20120)

- Fixed Shadow Trap and Defile Targets
- Fixed Shadow Trap Summon Delay and Duration
- Fixed Berserk Timer (15 Minutes)
- Fixed Shadow Trap Despawn when Snowstorm starts

(cherry picked from commit 9fa68855d7)

src/server/game/Spells/SpellMgr.cpp

@@ -3628,13 +3628,13 @@ void SpellMgr::LoadSpellInfoCorrections()
     // Summon Shadow Trap
     ApplySpellFix({ 73540 }, [](SpellInfo* spellInfo)
     {
-        spellInfo->DurationEntry = sSpellDurationStore.LookupEntry(23); // 90 seconds
+        spellInfo->DurationEntry = sSpellDurationStore.LookupEntry(3); // 60 seconds
     });
 
     // Shadow Trap (visual)
     ApplySpellFix({ 73530 }, [](SpellInfo* spellInfo)
     {
-        spellInfo->DurationEntry = sSpellDurationStore.LookupEntry(28); // 5 seconds
+        spellInfo->DurationEntry = sSpellDurationStore.LookupEntry(27); // 3 seconds
     });
 
     // Summon Spirit Bomb