[CI] Move queue setting to project level

Per [1].

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

Change-Id: I034d7dc4ea40654221d8a748f0fbe836a2e729e5
(cherry picked from commit b6e75b5)

Author: priteau

zuul.d/project.yaml

@@ -1,10 +1,10 @@
 ---
 - project:
+    queue: kayobe
     check:
       jobs:
         - openstack-tox-pep8
 
     gate:
-      queue: kayobe
       jobs:
         - openstack-tox-pep8