[hotfix][build] Fix compilation

[snuyanzin]

What is the purpose of the change

The PR fixes compilation broken at #28373
https://github.com/apache/flink/actions/runs/30635885226

Brief change log

Broken ForStStateBackendConfigTest

Verifying this change

compilation

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? (not applicabl)

---

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• Yes (please specify the tool below)

Generated-by: [Tool Name and Version]

[flinkbot]

CI report:

• 62fe6dc Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

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

[francis-a]

Thank you for the fix!

[snuyanzin]

everything is much worse
the test is expecting 10 and actual is 4
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=77624&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=1ffc5ec2-7913-50ff-0177-3fca16f1b8f0&l=12254

I'm going just revert the problem commit (fyi: @spuru9 @Zakelly @francis-a )