In order to quantify the impact of deprecating server-side JS, we would like to add op counters for the list of js functions that are not easily expressed in MQL (resulting from SERVER-93000).

Once SERVER-93000 is complete, implement these op counters so we can measure the actual usage by customers in production.

This was chosen as an alternative to modifying the query shape, as the query shape/query stats for this purpose is not the appropriate place for this information. Different server-side JS functions used within a $where operator is not indicative of a significant change in workload or operation.