fix(iceberg): fix hidden row id for iceberg engine table

[chenzl25]

I hereby agree to the terms of the RisingWave Labs, Inc. Contributor License Agreement.

What's changed and what's your intention?

• feat(iceberg): refine iceberg table column datatype and name. #19690 introduces hummock to iceberg query conversion in planner phase, but we didn't switch from the binder phase to it. This PR removes the hummock to iceberg query binder conversion, so let the planner conversion take effect.

Checklist

• I have written necessary rustdoc comments.
• I have added necessary unit tests and integration tests.
• I have added test labels as necessary.
• I have added fuzzing tests or opened an issue to track them.
• My PR contains breaking changes.
• My PR changes performance-critical code, so I will run (micro) benchmarks and present the results.
• My PR contains critical fixes that are necessary to be merged into the latest release.

Documentation

• My PR needs documentation updates.

Release note

[Li0k]

LGTM