Move legacy jobs to project

This patch implements first step in zuulv3 migration guide [1]:

Move jobs to Cyborg repo

[1] https://docs.openstack.org/infra/manual/zuulv3.html#legacy-job-migration-details

Change-Id: I31d5d7aed511aca18c1096b9f5eb7572f683d613
Needed-By: If816cfec5ace8f9fd7293c0749948d2c0dcb817a
Needed-By: I40e9380d049f541bf34488a3010d95f4a6835179

playbooks/legacy/cyborg-devstack/post.yaml

@@ -0,0 +1,15 @@
+- hosts: primary
+  tasks:
+
+    - name: Copy files from {{ ansible_user_dir }}/workspace/ on node
+      synchronize:
+        src: '{{ ansible_user_dir }}/workspace/'
+        dest: '{{ zuul.executor.log_root }}'
+        mode: pull
+        copy_links: true
+        verify_host: true
+        rsync_opts:
+          - --include=/logs/**
+          - --include=*/
+          - --exclude=*
+          - --prune-empty-dirs