Switch to prepare-workspace-git

This is what we actually want here and is more efficient as it
will use git push to push refs.

Change-Id: Ie0978bcd3c03c0a7905eb5c07246717806f5e3ae

playbooks/zuul/run-production-playbook.yaml

@@ -16,12 +16,8 @@
 - hosts: bridge.openstack.org
   tasks:
     - name: Synchronize src repos to workspace directory.
-      synchronize:
-        delete: false
-        dest: .
-        recursive: true
-        src: "{{ zuul.executor.src_root }}"
-      no_log: true
+      include_role:
+        name: prepare-workspace-git
 
     - name: Run the production playbook and capture logs
       block: