virtio-balloon does not check VIRTIO_BALLOON_F_STATS_VQ before creating statsq

According to section 5.5.2 from https://docs.oasis-open.org/virtio/virtio/v1.3/virtio-v1.3.html statsq only exists if VIRTIO_BALLOON_F_STATS_VQ is set. but in https://gitlab.com/qemu-project/qemu/-/blob/master/hw/virtio/virtio-balloon.c?ref_type=heads#L895 QEMU creates statsq without checking host_features

Not sure if this is expected behavior or a bug.