Add the possibility for DE to enable/disable output stages when the user has read only privileges:

<CompassAggregations enableOutputStages={true|false} />

See. https://mongodb.slack.com/archives/C03J73N4L58/p1661286440219829

NOTE: this task should not affect the current behavior of Compass: users may have more granular privileges (per namespace), and when connected to data federation $out and $merge should always be visible since is not possible to determine user privileges on the destination.