Release DataFusion `49.0.0` (July 2025)

[alamb]

Is your feature request related to a problem or challenge?

Tracking ticket for next release, also a place to track desired inclusions

Previous release will be https://crates.io/crates/datafusion/47.0.0 (April, 2025) so next major release would be late May or Early June 2025

Steps:

• [ ] Update version and changelog:
• [ ] Test with DataFusion Python:
• [ ] Test with DataFusion Comet
• [ ] Test with delta.rs:
• [ ] Test with LakeSail:
• [ ] Write upgrade guide:
• [ ] Test with parquet viewer
• [ ] Test with datafusion-materialized-views
• [ ] Voting Thread:
• [ ] Create ticket for next release:

Prior release tickets:

• 48.0.0: https://github.com/apache/datafusion/issues/15771

Changes to add to upgrade guide

These PRs made changes that deserve a mention in the upgrade guide

• [ ] https://github.com/apache/datafusion/pull/16217
• [ ] https://github.com/apache/datafusion/issues/16428

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

• [ ] https://github.com/apache/datafusion/pull/14837
• [ ] https://github.com/apache/datafusion/issues/15271

Bugs that need to be fixed

• [ ] https://github.com/apache/datafusion/issues/16308

Bugs that would be good to fix

TBD

Community Wishlist

• [ ] https://github.com/apache/datafusion/pull/15361
• [ ] https://github.com/apache/datafusion/issues/16353