Update deprecated zuul syntax

Queues are now declared at the project level

https: //lists.openstack.org/pipermail/openstack-discuss/2021-November/025797.html
(cherry picked from commit 56f0110b1ef7a98dac206c92cc65b2a2c519922a)

Manual fix for stable branch: Drop failing lower-constraints job
template, that is mostly dropped from all other projects.

Change-Id: Iae33d7c725274be9de1aa66ad73b2d610c36e061

.zuul.yaml

@@ -74,9 +74,9 @@
       rally_task: rally-jobs/zaqar-zaqar.yaml
 
 - project:
+    queue: zaqar
     templates:
       - check-requirements
-      - openstack-lower-constraints-jobs
       - openstack-python3-yoga-jobs
       - periodic-stable-jobs
       - publish-openstack-docs-pti
@@ -94,7 +94,6 @@
         - zaqar-rally:
             voting: false
     gate:
-      queue: zaqar
       jobs:
         - zaqar-tox-integration
         - zaqar-tempest-plugin-mongodb