Refine CSRS command must acquire the DistLock if received from a router

In SERVER-52777, the distributed lock acquisition for refine collection shard key has been moved from the CSRS to the primary shard, meaning that now the CSRS is not taking it when receiving a request from a last-lts router.

A possible multiversion-compatible solution is to acquire the distributed lock only when a request is not received from the primary shard (meaning that it has been received from a last-lts router).