[FLINK-37002][table] Migrate DecomposeGroupingSetsRule to java

[liuyongvs]

What is the purpose of the change

The PR migrates DecomposeGroupingSetsRule to java

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? (not applicable)

[flinkbot]

CI report:

• d2e4c8a Azure: SUCCESS

Bot commands

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

[davidradl]

Assuming the test coverage is good, I see the build passes; this looks good to me.

[liuyongvs]

hi @snuyanzin will you help review this?