Stream additional block metadata via plugin (#22023)

* Stream additional block metadata through plugin
blockhash, block_height, block_time, rewards are streamed

accountsdb-plugin-postgres/scripts/drop_schema.sql

@@ -8,6 +8,7 @@ DROP TABLE account_audit;
 DROP TABLE account;
 DROP TABLE slot;
 DROP TABLE transaction;
+DROP TABLE block;
 
 DROP TYPE "TransactionError" CASCADE;
 DROP TYPE "TransactionErrorCode" CASCADE;