Updated to latest virtio-queue and vm-memory 0.7.0

[RaduNiculae]

Updated the virtio-queue, virtio-blk, virtio-device to the commit d8ef45f and vm-memory 0.7.0.

Signed-off-by: Niculae Radu r.niculae99@gmail.com

Summary of the PR

The new virtio-queue implementation does not allow Queue to be cloned since QueueState does not implement the Clone trait anymore. The queues in VirtioConfig are removed after the configuration steps and added to their corresponding handlers.

Requirements

Before submitting your PR, please make sure you addressed the following requirements:

• [ ] All commits in this PR are signed (with git commit -s), and the commit message has max 60 characters for the summary and max 75 characters for each description line.
• [ ] All added/changed functionality has a corresponding unit/integration test.
• [ ] Any newly added unsafe code is properly documented.

[lauralt]

If you do another push, it would actually be nice to add the explanation from the summary to the commit message as well.