refactor(Core/Object): adds consistency in the use of type object check (#19671)

src/server/scripts/Outland/CoilfangReservoir/SerpentShrine/boss_lady_vashj.cpp

@@ -170,7 +170,7 @@ struct boss_lady_vashj : public BossAI
 
     void MoveInLineOfSight(Unit* who) override
     {
-        if (!_intro && who->GetTypeId() == TYPEID_PLAYER)
+        if (!_intro && who->IsPlayer())
         {
             _intro = true;
             Talk(SAY_INTRO);

src/server/scripts/Outland/CoilfangReservoir/SteamVault/boss_warlord_kalithresh.cpp

@@ -62,7 +62,7 @@ struct boss_warlord_kalithresh : public BossAI
 
     void MoveInLineOfSight(Unit* who) override
     {
-        if (!_introDone && who->GetTypeId() == TYPEID_PLAYER && me->IsWithinDistInMap(who, 35.0f))
+        if (!_introDone && who->IsPlayer() && me->IsWithinDistInMap(who, 35.0f))
         {
             Talk(SAY_INTRO);
             _introDone = true;