Yet more fix laravel branch/master publish jobs

The publish-artifacts-to-fileserver role expects to find artifacts
in zuul.executor.work_root instead of zuul.executor.log_root, so
create that directory and put tarballs there in the
legacy-laravel-openstackid-release-branch and
legacy-laravel-openstackid-release-master jobs.

Change-Id: Iece862a4a66835e362cc1d67b7add8105fe61e6c

playbooks/legacy/laravel-openstackid-release-branch/post.yaml

@@ -29,14 +29,14 @@
 
     - name: Ensure artifact transit directory exists
       file:
-        path: '{{ zuul.executor.log_root }}/artifacts'
+        path: '{{ zuul.executor.work_root }}/artifacts'
         state: directory
       delegate_to: localhost
 
     - name: Copy files from {{ ansible_user_dir }}/workspace/ on node
       synchronize:
         src: '{{ ansible_user_dir }}/workspace/'
-        dest: '{{ zuul.executor.log_root }}/artifacts/'
+        dest: '{{ zuul.executor.work_root }}/artifacts/'
         mode: pull
         copy_links: true
         verify_host: true

playbooks/legacy/laravel-openstackid-release-master/post.yaml

@@ -29,14 +29,14 @@
 
     - name: Ensure artifact transit directory exists
       file:
-        path: '{{ zuul.executor.log_root }}/artifacts'
+        path: '{{ zuul.executor.work_root }}/artifacts'
         state: directory
       delegate_to: localhost
 
     - name: Copy files from {{ ansible_user_dir }}/workspace/ on node
       synchronize:
         src: '{{ ansible_user_dir }}/workspace/'
-        dest: '{{ zuul.executor.log_root }}/artifacts/'
+        dest: '{{ zuul.executor.work_root }}/artifacts/'
         mode: pull
         copy_links: true
         verify_host: true