build(deps): bump datafusion-expr from 29.0.0-rc1 to 31.0.0-rc1

Bumps [datafusion-expr](https://github.com/apache/arrow-datafusion) from 29.0.0-rc1 to 31.0.0-rc1.
- [Changelog](https://github.com/apache/arrow-datafusion/blob/main/.github_changelog_generator)
- [Commits](apache/datafusion@8265e99...44cf6f1)

---
updated-dependencies:
- dependency-name: datafusion-expr
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>