[FLINK-38878][runtime] Add parse_json function. (#4227) #1847

Job	Run time
License Check	4m 10s
Common Unit Tests / test (11, generic, core)	11m 54s
Pipeline Unit Tests / test (11, generic, doris, elasticsearch, fluss, hudi, iceberg, kafka, maxcompute, mysql-pipeline,...	35m 51s
Source E2E Tests / test (11, 1.19.3, source_e2e)	22m 3s
Source E2E Tests / test (11, 1.20.3, source_e2e)	21m 54s
Source Unit Tests / test (11, generic, db2, mongodb)	43m 21s
Source Unit Tests / test (11, generic, postgres-source, oceanbase-source, tidb, vitess)	35m 36s
Source Unit Tests / test (11, generic, oracle, sqlserver)	1h 31m 52s
Source Unit Tests / test (11, generic, mysql-source)	46m 44s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.19.3, pipeline_e2e)	1h 14m 52s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 14m 3s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 8m 15s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.19.3, pipeline_e2e)	1h 29m 34s
	10h 20m 9s

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