Core/Misc: don't allow players to use/activate/loot non-allowed gameobjects while under the effect of a damage immunity aura (#23319)

* Core/Misc: don't allow players to use/activate/loot non-allowed gameobjects while under the effect of a damage immunity aura.

* Forgot to change this in last-second rename.

* Apply suggested changes, thanks Shauren!

# Conflicts:
#	src/server/game/Entities/GameObject/GameObject.cpp
#	src/server/game/Entities/Unit/UnitDefines.h
#	src/server/game/Entities/Unit/enuminfo_UnitDefines.cpp
#	src/server/scripts/Outland/CoilfangReservoir/TheSlavePens/boss_ahune.cpp

src/server/game/Entities/GameObject/GameObject.cpp

@@ -1428,6 +1428,12 @@ void GameObject::Use(Unit* user)
 
     if (Player* playerUser = user->ToPlayer())
     {
+        if (m_goInfo->CannotBeUsedUnderImmunity() && playerUser->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_IMMUNE))
+            return;
+
+        if (!m_goInfo->IsUsableMounted())
+            playerUser->RemoveAurasByType(SPELL_AURA_MOUNTED);
+
         playerUser->PlayerTalkClass->ClearMenus();
         if (AI()->GossipHello(playerUser))
             return;