make rsync use ssh args so you can do --ansible-param='--ssh-common-args=-i ~/.ssh/openappstack-ci'

ansible/roles/apps/tasks/init.yml

@@ -15,6 +15,7 @@
     src: '../../helmfiles'
     dest: '{{ data_directory }}/source'
     delete: true
+    use_ssh_args: true
   become: true
 
 - name: Create value overrides directory