[CI] Move queue setting to project level

Per [1].

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

Change-Id: I217033ab7266e9760ee92eb46401a11b82990030

zuul.d/projects.yaml

@@ -1,5 +1,6 @@
-
+---
 - project:
+    queue: trove
     templates:
       - check-requirements
       - openstack-cover-jobs
@@ -27,7 +28,6 @@
         - trove-functional-mysql:
             voting: false
     gate:
-      queue: trove
       jobs:
         - trove-tempest:
             voting: false
@@ -41,4 +41,4 @@
     periodic:
       jobs:
         - publish-trove-guest-image-ubuntu-focal
-        - publish-trove-guest-image-ubuntu-focal-dev
+        - publish-trove-guest-image-ubuntu-focal-dev