Packed virtqueue support was added.

1) Extend flavor/image extra spec.
2) New xml parameter for qemu command was added.
3) New request filter added for scheduler.
4) Unit and Functional tests were updated
5) Requirments was updated ( os-traits = 3.0.0 )
6) Releasnote was added

Nova spec: https://review.opendev.org/c/openstack/nova-specs/+/868377

Depends-On: https://review.opendev.org/c/openstack/os-traits/+/876069
Change-Id: I789eeae86947e9a3cbd7d5fcc58d2aabe3b8b84c

doc/notification_samples/common_payloads/ImageMetaPropsPayload.json

@@ -4,5 +4,5 @@
         "hw_architecture": "x86_64"
     },
     "nova_object.name": "ImageMetaPropsPayload",
-    "nova_object.version": "1.12"
+    "nova_object.version": "1.13"
 }