Updates the acl and adds new config files for api-site

This clarifies that the documentation team does not own the
api-site.

Change-Id: I990e5a04f4631efd901087a0bd58d3a753c0f785

gerrit/acls/openstack/api-site.config

@@ -0,0 +1,11 @@
+[access "refs/heads/*"]
+abandon = group api-site-core
+label-Code-Review = -2..+2 group api-site-core
+label-Workflow = -1..+1 group api-site-core
+
+[receive]
+requireChangeId = true
+requireContributorAgreement = true
+
+[submit]
+mergeContent = true

gerrit/projects.yaml

@@ -916,7 +916,6 @@
   options:
     - translate
   description: OpenStack API site
-  acl-config: /home/gerrit2/acls/openstack/openstack-manuals.config
 - project: openstack/api-wg
   description: API Working Group
   homepage: https://wiki.openstack.org/wiki/API_Working_Group