Assume sharded DB in replay-verify

Resolves the error where ledger metadb can't be opened under
db/ledger_db, because when sharded the db should be at
db/ledger_db/metadata

testsuite/replay-verify/main.py

@@ -23,7 +23,7 @@
     get_kubectl_credentials,
 )
 
-SHARDING_ENABLED = False
+SHARDING_ENABLED = True
 MAX_RETRIES = 5
 RETRY_DELAY = 20  # seconds
 QUERY_DELAY = 5  # seconds