Support column mapping

[dennyglee]

Description

Per 1076, it would be great for delta-rs to support column mapping. With Delta tables that support column mapping, the altering or dropping of columns is a metadata only operation.

Use Case
As folks can enable column mapping for Delta tables, it would be great for delta-rs to support this feature.

Related Issue(s)
#1076, #1064

[polynomialherder]

I've started working through this -- I'll reach out with updates and questions

[aersam]

On python side, I guess it's not possible to implement with the current to_pyarrow_dataset method, since Dataset does not support a distinction between physical and logical column names. I opened an issue about that: apache/arrow#36593

With pyarrow Table would be fairly straight forward, one could probably also expose a RecordBatchReader based on a dataset which uses physical column names.

[keen85]

@rtyler, are there any plans to support column mappings (reader v2, writer v5) in the future?
It is not on the roadmap