[Spark] Preserves the original table format when migrating from hive to Iceberg

[whbing]

Run the following command to migrate the Hive table. The default table format is parquet even if the original table format is orc. This patch will preserves the format of the original hive table if no table format is specified.

CALL spark_catalog.system.migrate('db.tbl');

[github-actions]

This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.

[github-actions]

This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'