vmm, virtio-devices: Move BlocksState creation to the MemoryManager

By creating the BlocksState object in the MemoryManager, we can directly
provide it to the virtio-mem device when being created. This will allow
the MemoryManager through each VirtioMemZone to have a handle onto the
blocks that are plugged at any point in time.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

vmm/src/device_manager.rs

@@ -2694,6 +2694,7 @@ impl DeviceManager {
                         self.exit_evt
                             .try_clone()
                             .map_err(DeviceManagerError::EventFd)?,
+                        virtio_mem_zone.blocks_state().clone(),
                     )
                     .map_err(DeviceManagerError::CreateVirtioMem)?,
                 ));