feat: support named parameters for table functions

[bubulalabu]

Which issue does this PR close?

no issue, it's a follow up PR for #18535

Rationale for this change

Table functions currently only support positional arguments. This PR adds support for named parameters (e.g., batched_generate_series(stop => 5, start => 1)) to match the functionality already available for scalar, aggregate, and window functions.

Are there any user-facing changes?

Yes. Users can now call batched table functions with named parameters:

-- Arguments can be specified out of orderSELECT*FROM batched_generate_series(stop =>10, start =>1);
-- Mix positional and named (positional must come first)SELECT*FROM batched_generate_series(1, stop =>10);
-- Works in LATERAL joins tooSELECTt.id, value
FROM my_table t
CROSS JOIN LATERAL batched_generate_series(start =>t.start_col, stop =>t.end_col);

This is purely additive - existing positional argument calls continue to work as before.

[alexanderbianchi]

This is intended to be merged after #18535, could something similar be done for the current TableFunctionImpl?

[bubulalabu]

No, the current TableFunctionImpl doesn't have a Signature which we need for named parameters.

[github-actions]

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