Flink Iceberg should support Flink's IOs in addition to Iceberg's IO

[mxm]

Feature Request / Improvement

Flink already has a so called FileSystem implementation for S3, HDFS, and others. Iceberg ships its own implementation via FileIO. In many scenarios, Flink's file system is already setup correctly, but still the user has to go through hoops to setup Iceberg's FileIO.

Flink Iceberg should get a wrapper which discovers Flink's FileSystem and defers calls to it.

Query engine

Flink

Willingness to contribute

• I can contribute this improvement/feature independently
• I would be willing to contribute this improvement/feature with guidance from the Iceberg community
• I cannot contribute this improvement/feature at this time

[github-actions]

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[mxm]

There was a pre-existing PR, #10151, which has been resumed by #16411.