[hotfix][table-planner] fix the failed cases caused by junit5

[xuyangzhong]

What is the purpose of the change

Fix the failed case in DistinctAggregateTest.

Brief change log

• Fix the failed case

Verifying this change

This change is already covered by existing tests.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? no

[flinkbot]

CI report:

• 597428f Azure: PENDING

Bot commands

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• @flinkbot run azure re-run the last Azure build

[fsk119]

Thanks for the quick fix. LGTM

Merging when CI passes...

[snuyanzin]

thanks for the fix looks like this was fixed within #23721

[fsk119]

Thanks a lot for your help. I close this one.