Today, _clusterQueryWithoutShardKey & _clusterWriteWithoutShardKey check at the start of the command if the cluster role is exclusively RouterServer. This means that those commands can only be run in a standard MongoS.

The goal of this ticket is to remove this those checks, in order to be able to run _clusterQueryWithoutShardKey & _clusterWriteWithoutShardKey when the RouterServer is present, but not exclusive.