Update zuul queue configuration

Zuul is changing how queues are declared[1]. This patch updates Designate for the new way to define the queue.

[1] https://lists.zuul-ci.org/pipermail/zuul-discuss/2022-May/001801.html

Change-Id: I94324104a7ed89e757d48bb250d8b1132026ce46

.zuul.yaml

@@ -187,9 +187,8 @@
         - designate-grenade-pdns4
         - designate-ipv6-only-pdns4
         - designate-ipv6-only-bind9
-
+    queue: designate
     gate:
-      queue: designate
       jobs:
         - designate-bind9
         - designate-bind9-scoped-tokens
@@ -212,8 +211,8 @@
         - neutron-tempest-plugin-designate-scenario
         - designate-tox-dnspython-latest:
             voting: false
+    queue: designate
     gate:
-      queue: designate
       jobs:
         - neutron-tempest-plugin-designate-scenario
     experimental: