feat: Enable Multiple Input Ports on R UDF operators

[kunwp1]

What changes were proposed in this PR?

This PR adds multi-port support to R UDF operators by aligning R UDF descriptors with the Python UDF operator descriptor. Users can now add additional input ports and customize the port configuration.

Any related issues, documentation, discussions?

Closes #4173

How was this PR tested?

Test with this workflow R UDF Multi Port.json
Dataset: Iris.csv

The first port will run first and the second port will run next.

Was this PR authored or co-authored using generative AI tooling?

No.

[kunwp1]

I initially assigned this PR to @chenlica because @Ma77Ball isn’t a contributor and can’t be assigned as a reviewer.

[Yicong-Huang]

I initially assigned this PR to @chenlica because @Ma77Ball isn’t a contributor and can’t be assigned as a reviewer.

For those cases, just @ him in comment.

[Yicong-Huang]

There must be some change on the Rudf template. Can we also add the changes in this PR?

[kunwp1]

There must be some change on the Rudf template. Can we also add the changes in this PR?

What should we change in the template? It already includes port as a parameter.

[Yicong-Huang]

What should we change in the template? It already includes port as a parameter.

Oh I didn't realize we already did that. Then I don't think we need other changes.

[Ma77Ball]

@kunwp1 I ran the code locally, and it worked as expected. I think we can add more human-readable error logs in a future PR. Overall, though the code, LGTM!