[FLINK-33445][docs-zh] Translate DataSet migration guideline to Chinese

[liyubin117]

What is the purpose of the change

Translate DataSet migration guideline to Chinese
https://nightlies.apache.org/flink/flink-docs-master/zh/docs/dev/datastream/dataset_migration/

Brief change log

• add translation in docs/content.zh/docs/dev/datastream/dataset_migration.md

Verifying this change

Docs only change.

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/Mesos, 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

[liyubin117]

@WencongLiu I have finished the translation, PTAL, thanks!

[flinkbot]

CI report:

• fa7e668 Azure: SUCCESS
• 2dd4dc6 UNKNOWN

Bot commands

The @flinkbot bot supports the following commands:

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

[WencongLiu]

@WencongLiu I have finished the translation, PTAL, thanks!

Thanks for the contribution. I'll take a look.

[WencongLiu]

This pull request looks good overall. But there are some Chinese expressions that don't quite fit the context. I've left some comments. PTAL. 😄

[reswqa]

Thanks @WencongLiu and @liyubin117. Nice work, +1 for merging.

[reswqa]

@liyubin117 Could you squash all commit?

[liyubin117]

@reswqa Squash done :)