[native] Register Velox hive connector factory for iceberg

The current iceberg catalog uses "hive" for the connector.name.
Register a Velox hive connector factory for iceberg with name `iceberg`.
"connector.name=iceberg" is now supported.

presto-native-execution/etc/catalog/iceberg.properties

@@ -1,2 +1 @@
-# The Presto "iceberg" catalog is handled by the hive connector in Presto native execution.
-connector.name=hive
+connector.name=iceberg

presto-native-execution/presto_cpp/main/PrestoServer.cpp

@@ -46,6 +46,7 @@
 #include "velox/common/memory/MmapAllocator.h"
 #include "velox/common/memory/SharedArbitrator.h"
 #include "velox/connectors/Connector.h"
+#include "velox/connectors/hive/HiveConnector.h"
 #include "velox/core/Config.h"
 #include "velox/exec/OutputBufferManager.h"
 #include "velox/functions/prestosql/aggregates/RegisterAggregateFunctions.h"
@@ -224,6 +225,11 @@ void PrestoServer::run() {
   registerShuffleInterfaceFactories();
   registerCustomOperators();
 
+  // Register Velox connector factory for iceberg.
+  // The iceberg catalog is handled by the hive connector factory.
+  connector::registerConnectorFactory(
+      std::make_shared<connector::hive::HiveConnectorFactory>("iceberg"));
+
   registerPrestoToVeloxConnector(
       std::make_unique<HivePrestoToVeloxConnector>("hive"));
   registerPrestoToVeloxConnector(