Core, Hive: Close FileIO in HadoopCatalog and HiveCatalog

[dejii]

Summary

• HadoopCatalog: add fileIO to existing closeableGroup
• HiveCatalog: introduce CloseableGroup (replacing manual close calls) and register fileIO, keyManagementClient, and metricsReporter

Problem

All major Iceberg catalog implementations close their FileIO when catalog.close() is called — except HadoopCatalog and HiveCatalog:

For the default HadoopFileIO this is harmless — it has no close() implementation. But users who configure a non-default FileIO via io-impl (e.g. S3FileIO, GCSFileIO) will leak HTTP connection pools since close() is never called on the FileIO.

Impact

• Default config (HadoopFileIO): No behavioral change
• Non-default FileIO (S3FileIO, GCSFileIO): Connection pools are now properly released on catalog close

Discovered while fixing a connection pool crash in Apache Beam's IcebergIO