[FLINK-38450][iceberg] Fix duplicate records when schema change splits writes within a checkpoint #2427

Job	Run time
License Check	6m 37s
Pipeline Connectors Unit Tests 2.x / test (11, 2.2.0, doris, elasticsearch, fluss, iceberg, kafka, maxcompute, mysql-pipeline, oceanba...	1h 3m 39s
Common Unit Tests / test (11, generic, core)	14m 20s
Source Unit Tests 2.x / test (11, 2.2.0, oracle, sqlserver)	39m 43s
Source Unit Tests 2.x / test (11, 2.2.0, postgres-source, oceanbase-source, tidb, vitess)	24m 19s
Pipeline Unit Tests / test (11, generic, doris, elasticsearch, fluss, hudi, iceberg, kafka, maxcompute, mysql-pipeline,...	1h 4m 31s
Source Unit Tests 2.x / test (11, 2.2.0, mysql-source)	42m 20s
Common Unit Tests 2.x / test (11, 2.2.0, core)	15m 35s
Source Unit Tests / test (11, generic, oracle, sqlserver)	45m 48s
Source Unit Tests 2.x / test (11, 2.2.0, db2, mongodb)	35m 35s
Source Unit Tests / test (11, generic, postgres-source, oceanbase-source, tidb, vitess)	38m 17s
Source Unit Tests / test (11, generic, mysql-source)	47m 23s
Source Unit Tests / test (11, generic, db2, mongodb)	43m 41s
Source E2E Tests / test (11, 1.20.3, source_e2e)	25m 3s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 27m 28s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 26m 18s
Pipeline E2E Tests 2.x (4-Parallelism) / test (11, 2.2.0, pipeline_e2e)	1h 1m 20s
Pipeline E2E Tests 2.x (1-Parallelism) / test (11, 2.2.0, pipeline_e2e)	1h 2m 16s
	13h 24m 13s

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