fix(Core/Unit): update death state before handling RemoveAllAurasOnDeath() (#20124)

fix setDeathState

[PATCH] Don't allow units to enter combat upon death
https://github.com/TrinityCore/TrinityCore/commit/91ebea4a77e1db10cea85ff8e891a2ea3f3587ab.patch
Co-authored-by: trickerer <onlysuffering@gmail.com>

src/server/game/Combat/ThreatMgr.cpp

@@ -416,7 +416,7 @@ ThreatMgr::ThreatMgr(Unit* owner) : iCurrentVictim(nullptr), iOwner(owner), iUpd
 
 void ThreatMgr::ClearAllThreat()
 {
-    if (iOwner->CanHaveThreatList() && !isThreatListEmpty())
+    if (iOwner->CanHaveThreatList(true) && !isThreatListEmpty())
         iOwner->SendClearThreatListOpcode();
     clearReferences();
 }