refactor(Core/Creature): Remove Inhabit Type (#9272)

This is in reference to issue: https://github.com/azerothcore/azerothcore-wotlk/issues/4361
This is comprised of a cherry pick and partial tc cherry pick:
592516ae69
dbadb6369c
34cfa69efd
12de860b4a
a22bc236eb

src/server/game/Combat/HostileRefMgr.cpp

@@ -94,6 +94,19 @@ void HostileRefMgr::setOnlineOfflineState(bool isOnline)
     }
 }
 
+//=================================================
+// The online / offline status is calculated and set
+
+void HostileRefMgr::updateThreatTables()
+{
+    HostileReference* ref = getFirst();
+    while (ref)
+    {
+        ref->updateOnlineStatus();
+        ref = ref->next();
+    }
+}
+
 //=================================================
 // The references are not needed anymore
 // tell the source to remove them from the list and free the mem