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

requirements.txt

@@ -52,7 +52,7 @@ psutil>=3.2.2 # BSD
 oslo.versionedobjects>=1.35.0 # Apache-2.0
 os-brick>=5.2 # Apache-2.0
 os-resource-classes>=1.1.0 # Apache-2.0
-os-traits>=2.10.0 # Apache-2.0
+os-traits>=3.0.0 # Apache-2.0
 os-vif>=3.1.0 # Apache-2.0
 castellan>=0.16.0 # Apache-2.0
 microversion-parse>=0.2.1 # Apache-2.0