[FLINK-38450][iceberg] Fix duplicate records when schema change splits writes within a checkpoint #2360

Job	Run time
License Check	4m 39s
Pipeline Unit Tests / test (11, generic, doris, elasticsearch, fluss, hudi, iceberg, kafka, maxcompute, mysql-pipeline,...	5m 49s
Common Unit Tests 2.x / test (11, 2.2.0, core)	14m 19s
Pipeline Connectors Unit Tests 2.x / test (11, 2.2.0, doris, elasticsearch, fluss, iceberg, kafka, maxcompute, mysql-pipeline, oceanba...	6m 3s
Source Unit Tests / test (11, generic, db2, mongodb)	44m 9s
Source Unit Tests / test (11, generic, postgres-source, oceanbase-source, tidb, vitess)	36m 49s
Source Unit Tests / test (11, generic, oracle, sqlserver)	52m 45s
Common Unit Tests / test (11, generic, core)	15m 53s
Source Unit Tests / test (11, generic, mysql-source)	47m 13s
Source E2E Tests / test (11, 1.20.3, source_e2e)	6m 27s
Source Unit Tests 2.x / test (11, 2.2.0, db2, mongodb)	34m 23s
Source Unit Tests 2.x / test (11, 2.2.0, oracle, sqlserver)	39m 54s
Source Unit Tests 2.x / test (11, 2.2.0, postgres-source, oceanbase-source, tidb, vitess)	24m 45s
Source Unit Tests 2.x / test (11, 2.2.0, mysql-source)	43m 36s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.20.3, pipeline_e2e)	6m 54s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.20.3, pipeline_e2e)	6m 24s
Pipeline E2E Tests 2.x (4-Parallelism) / test (11, 2.2.0, pipeline_e2e)	7m 31s
Pipeline E2E Tests 2.x (1-Parallelism) / test (11, 2.2.0, pipeline_e2e)	6m 12s
	6h 43m 45s

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