Iceberg: Fix checkstyle file to adapt new checkstyle version

HIVE-28499 has gave the details about checkstyle issue in hive project. we have three different checkstyle files, one is for hive-iceberg handler module, another one is for other modules.

• Hive Iceberg handler

https://github.com/apache/hive/blob/master/iceberg/checkstyle/checkstyle.xml

• standalone-metastore 

https://github.com/apache/hive/blob/master/standalone-metastore/checkstyle/checkstyle.xml 

• Other modules

https://github.com/apache/hive/blob/master/checkstyle/checkstyle.xml

This ticket just want to fix the checkstyle of Hive Iceberg handler to adapt new checkstyle version. But over the long term, we may need to keep only one style.