Since SERVER-53092 we are using the "
ShardingRoutingInfoFormatStability" DistLock to ensure that DDL operations serialize with the patch up of metadata in the configsvr during FCV upgrade. This is to ensure DDL operations see a stable metadata format.
Currently, the DistLock serializes between shards and the configsvr or between threads on the same shard
For ShardingRoutingInfoFormatStability, we only wish to serialize between the configsvr and that shards, but not serialize DDL operations on the same shard.
For this, we could expose a "lockOnlyRemote" variant of the DistlockManager::lock that only serializes with the configsvr, and use it for the ShardingRoutingInfoFormatStability.