Release DataFusion `57.0.0` (Dec 2026 / Jan 2027)

[alamb]

Is your feature request related to a problem or challenge?

• Part of [EPIC] DataFusion Releases #19783

Previous release is #24461 (Oct / Nov 2026) so next major release would be approximately Dec 2026 / Jan 2027.

Steps:

• Create a branch-57 branch
• Update version and changelog
• Test with DataFusion Python
• Test with DataFusion Comet
• Test with DataFusion Ballista
• Test with delta.rs
• Test vortex
• Test with iceberg-rust
• Test with LakeSail
• Test with parquet viewer
• Test with datafusion-materialized-views
• Voting Thread
• Publish to crates.io
• Create ticket for next release
• Create blog post

Features to mention in the blog (if they make it)

• TODO

Bugs that should be fixed

• TODO

Community Wishlist

• Remove the legacy GroupedHashAggregateStream and enable_migration_aggregate #25902 by @alamb