Core/Misc: Change how Position struct is retrieved

Update Position::GetPosition() and similar methods signatures to reflect 2a4c9bcaf9 changes by return a Position object instead of accepting a Position parameter by reference.

src/server/scripts/Commands/cs_debug.cpp

@@ -1382,8 +1382,7 @@ public:
         }
         else
         {
-            Position pos;
-            transport->GetPosition(&pos);
+            Position pos = transport->GetPosition();
             handler->PSendSysMessage("Transport %s is %s", transport->GetName().c_str(), transport->GetGoState() == GO_STATE_READY ? "stopped" : "moving");
             handler->PSendSysMessage("Transport position: %s", pos.ToString().c_str());
             return true;