Flink: Support writing shredded variant in Flink#15596

Guosmilesmile wants to merge 15 commits into

apache:mainapache/iceberg:mainfrom

Guosmilesmile:flink_shredded_varisnt_fileformatGuosmilesmile/iceberg:flink_shredded_varisnt_fileformatCopy head branch name to clipboard