Add OpenStack ideas promote jobs

This will make possible to upload the files of the ideas repo into
the right folder for publication onto governance.o.o/ideas.

Needed-By: https://review.opendev.org/#/c/706240
Change-Id: I22bc23b923199052bdb1f916885b8195dbe94d3a

zuul.d/jobs.yaml

@@ -577,6 +577,17 @@
     vars:
       publish_site: "governance.openstack.org/election"
 
+- job:
+    name: promote-governance-ideas
+    parent: promote-tox-docs-site-base
+    description:
+      Promote content to governance.openstack.org/ideas.
+    final: true
+    allowed-projects:
+      - openstack/ideas
+    vars:
+      publish_site: "governance.openstack.org/ideas"
+
 - job:
     name: promote-governance-sigs
     parent: promote-tox-docs-site-base