refactor(ci_dcn_site): replace hardcoded /home/zuul paths

Replace hardcoded '/home/zuul' paths with ansible_user_dir variable to support non-zuul users in ci_cdn_role

# Conflicts:
#	roles/ci_dcn_site/defaults/main.yml

Author: Valkyrie00

roles/ci_dcn_site/tasks/ceph.yml

@@ -88,7 +88,7 @@
 
 - name: Deploy Ceph
   cifmw.general.ci_script:
-    output_dir: "/home/zuul/ci-framework-data/artifacts"
+    output_dir: "{{ ansible_user_dir }}/ci-framework-data/artifacts"
     chdir: "{{ ci_dcn_site_cifmw_repo_path }}"
     script: >-
       ansible-playbook