[FLINK-36985]remove Catalog.ColumnAlreadyExistException when apply applyAddColumnEventWithPosition in paimon #78

Job	Run time
License Check	3m 34s
Migration Tests / data_stream_migration_test (8, 1.19.1)	11m 49s
Migration Tests / migration_test_ut (8, 1.19.1)	4m 58s
Migration Tests / pipeline_migration_test (8, 1.19.1)	7m 20s
Migration Tests / migration_test_ut (8, 1.20.0)	5m 14s
Migration Tests / data_stream_migration_test (8, 1.20.0)	11m 47s
Migration Tests / pipeline_migration_test (8, 1.20.0)	6m 29s
Source E2E Tests / compile_and_test (8, 1.19.1)	24m 59s
Source E2E Tests / compile_and_test (8, 1.20.0)	25m 17s
Pipeline E2E Tests (1-Parallelism) / compile_and_test (8, 1.19.1)	33m 53s
Pipeline E2E Tests (1-Parallelism) / compile_and_test (8, 1.20.0)	33m 26s
Pipeline E2E Tests (4-Parallelism) / compile_and_test (8, 1.19.1)	33m 12s
Pipeline E2E Tests (4-Parallelism) / compile_and_test (8, 1.20.0)	33m 0s
Unit Tests (core) / compile_and_test (8, generic)	30m 28s
Unit Tests (db2) / compile_and_test (8, generic)	21m 24s
Unit Tests (mongodb6) / compile_and_test (8, generic)	30m 46s
Unit Tests (mongodb7) / compile_and_test (8, generic)	30m 47s
Unit Tests (mysql) / compile_and_test (8, generic)	30m 46s
Unit Tests (oracle) / compile_and_test (8, generic)	29m 42s
Unit Tests (oceanbase) / compile_and_test (8, generic)	6m 49s
Unit Tests (pipeline_connectors) / compile_and_test (8, generic)	20m 38s
Unit Tests (postgres) / compile_and_test (8, generic)	30m 30s
Unit Tests (sqlserver) / compile_and_test (8, generic)	13m 3s
Unit Tests (tidb) / compile_and_test (8, generic)	3m 30s
Unit Tests (vitess) / compile_and_test (8, generic)	3m 12s
	8h 6m 33s

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