[FLINK-39152][pipeline-connector][Fluss]Fix FlussConfig Utils class is not in the correct directory and not have a private instance #2033

Job	Run time
License Check	4m 26s
Source E2E Tests / test (11, 1.20.3, source_e2e)	23m 3s
Source E2E Tests / test (11, 1.19.3, source_e2e)	22m 16s
Common Unit Tests / test (11, generic, core)	13m 41s
Pipeline Unit Tests / test (11, generic, doris, elasticsearch, fluss, hudi, iceberg, kafka, maxcompute, mysql-pipeline,...	23m 19s
Source Unit Tests / test (11, generic, postgres-source, oceanbase-source, tidb, vitess)	36m 55s
Source Unit Tests / test (11, generic, oracle, sqlserver)	47m 16s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.19.3, pipeline_e2e)	1h 18m 5s
Source Unit Tests / test (11, generic, db2, mongodb)	43m 4s
Source Unit Tests / test (11, generic, mysql-source)	46m 29s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.19.3, pipeline_e2e)	1h 15m 25s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 31m 49s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 14m 48s
	9h 40m 36s

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