Added Enterprise setting for filtering audit course modes

CHANGELOG.md

 - Role: edxapp
+  - Added the EDXAPP_ENTERPRISE_COURSE_ENROLLMENT_AUDIT_MODES setting with default value ["audit"]
+
+- Role: edxapp
   - DOC_LINK_BASE settings have been removed, replaced by HELP_TOKENS_BOOKS
 
 - Role: edxapp

playbooks/roles/edxapp/defaults/main.yml

@@ -668,6 +668,9 @@ EDXAPP_ENTERPRISE_API_URL: "{{ EDXAPP_LMS_ROOT_URL }}/enterprise/api/v1"
 
 EDXAPP_ENTERPRISE_SERVICE_WORKER_USERNAME: "enterprise_worker"
 
+EDXAPP_ENTERPRISE_COURSE_ENROLLMENT_AUDIT_MODES:
+  - audit
+
 # The assigned ICP license number for display in the platform footer
 EDXAPP_ICP_LICENSE: !!null
 
@@ -1111,6 +1114,7 @@ lms_env_config:
   RECALCULATE_GRADES_ROUTING_KEY: "{{ EDXAPP_RECALCULATE_GRADES_ROUTING_KEY }}"
   CELERY_QUEUES: "{{ EDXAPP_LMS_CELERY_QUEUES }}"
   ALTERNATE_WORKER_QUEUES: "cms"
+  ENTERPRISE_COURSE_ENROLLMENT_AUDIT_MODES: "{{ EDXAPP_ENTERPRISE_COURSE_ENROLLMENT_AUDIT_MODES }}"
 
 cms_auth_config:
   <<: *edxapp_generic_auth