Upsert multiple monitored users via CSV upload

Spaces method and path for this operation:

<div><span class="operation-verb post">post</span>&nbsp;<span class="operation-path">/s/{space_id}/api/entity_analytics/monitoring/users/_csv</span></div>

Refer to Spaces for more information.

Bulk upserts privileged users by uploading a CSV file. Returns per-row errors and aggregate upload statistics.