Pass READ_ONLY_API_MODE to the worker-service

In order for this check [1] to pass when running the migrator via Turnpike, which
will kick it off in a worker, we need to ensure the param set in the environment
is set on the worker pod as well.

[1] https://github.com/RedHatInsights/insights-rbac/blob/240ffff00a989af6b4ea2f0320459df76200737e/rbac/migration_tool/migrate.py#L186

deploy/rbac-clowdapp.yml

@@ -238,6 +238,9 @@ objects:
             value: ${PRINCIPAL_CLEANUP_DELETION_ENABLED_UMB}
           - name: UMB_JOB_ENABLED
             value: ${UMB_JOB_ENABLED}
+          - name: READ_ONLY_API_MODE
+            value: ${READ_ONLY_API_MODE}
+
     - name: scheduler-service
       minReplicas: ${{MIN_SCHEDULER_REPLICAS}}
       metadata: