Remove finalizer on balloon to avoid segfault

Signed-off-by: Anders F Björklund <anders.f.bjorklund@gmail.com>

Author: afbjorklund

pkg/driver/vz/vz_driver_darwin.go

@@ -451,5 +451,7 @@ func (l *LimaVzDriver) SetTargetMemory(memory int64) error {
 		return errors.New("unexpected type of balloon")
 	}
 	balloon.SetTargetVirtualMachineMemorySize(uint64(memory))
+	// avoid segfault, when trying to Release
+	runtime.SetFinalizer(balloon, nil)
 	return nil
 }