fix(glue): Exclude historical schemas from Glue columns

[VABVAT]

Which issue does this PR close?

• Closes iceberg-catalog-glue pushes all historical schema fields to Glue, causing duplicate columns in Glue UI #2749

What changes are included in this PR?

This PR updates Glue schema conversion so AWS Glue StorageDescriptor.columns is populated only from the current Iceberg schema.

Previously, GlueSchemaBuilder::from_iceberg converted the current schema and then also converted historical schemas from table metadata. Those historical fields were written to Glue with iceberg.field.current=false, but Glue does not use that parameter to filter visible columns, which could cause duplicate columns to appear in the Glue Console after schema evolution.

Historical schemas are still preserved in Iceberg table metadata. This change only prevents them from being projected into Glue's visible column list.

Are these changes tested?

Yes.

Added a regression test covering schema evolution with historical schemas, and verified the Glue schema output contains only current schema fields.

Ran locally:

cargo test -p iceberg-catalog-glue

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.