Layout version should be available in DB for an un-finalized OM to be finalized through a Ratis snapshot.

Although OM Finalization is a Ratis request, it updates a persistent location outside the OM state machine maintained "RocksDB". Hence, in a rare case where an unfinalized OM needs a Ratis snapshot to finalize (without any logs), the VERSION file will not be updated, and hence the OM will be stuck in that state.