[FLINK-35781][cli] Provide a default parallelism (1) for pipeline jobs #3458
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ruanhang1993
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This closes FLINK-35781.
Currently, Flink CDC
PIPELINE_PARALLELISMoption is forcefully required in pipeline definition, which turns out to be unnecessary since Flink already has a fallback parallelism option.This PR adds a default value (1, same as Flink's default parallelism) in CDC CLI to resolve this issue.