Need an api to SyncKVStore when EnableAutoCheckpointing is disabled

When EnableAutoCheckpointing  is disabled, the SyncKVStore api returns an error. (This is because SyncKVStore is specifically intended to create a sync type checkpoint to force WAL Trim and lower recover WAL replay time, we dont need that since WAL is disabled).

Bhive uses the api to sync individual kvstore.  We need a similar api which works when EnableAutoCheckpointing is false. We cannot use Magma::Sync since it does for all the kvstores. Filing this based on a discussion with Apaar Gupta