[FLINK-30348] Add HasSeed param for RandomSplitter

[weibozhao]

What is the purpose of the change

• Add HasSeed param for RandomSplitter.

Brief change log

• Add API setSeed() for RandomSplitter Transformer in Java and Python.
• This parameter guarantees reproduciable output only when the paralleism is unchanged and each worker reads the same data in the same order.
• Add ut for this new API.

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): (yes)

Documentation

• Does this pull request introduce a new feature? (yes)
• If yes, how is the feature documented? (docs)

[yunfengzhou-hub]

Hi @weibozhao, The failure thrown in the CI of this PR has been fixed by a recently merged PR. Could you please rebase this PR onto the latest master code to ensure the tests can pass?

[yunfengzhou-hub]

Thanks for the PR. Left some comments as below.

[yunfengzhou-hub]

Hi @weibozhao, thanks for the update. Could you please modify the description section of this PR and its corresponding Jira ticket, explaining the changes made in this PR and why we should add them to Flink ML?

[weibozhao]

Hi @weibozhao, thanks for the update. Could you please modify the description section of this PR and its corresponding Jira ticket, explaining the changes made in this PR and why we should add them to Flink ML?

I have modified the description of this PR.

[zhipeng93]

@weibozhao Thanks for the update :) Can you also update the PR title as well as the commit message to make it more informative? (e.g., Add HasSeed param for RandomSplitter)

[weibozhao]

OK

[weibozhao]

@weibozhao Thanks for the update :) Can you also update the PR title as well as the commit message to make it more informative? (e.g., Add HasSeed param for RandomSplitter)

done.