Python Polars 0.14.23

🐞 Bug fixes

• fix explicit list + sort aggregation in groupby co… (#5317)
• fix sort-merge dispatch of utf8 (#5315)
• close multi-threading pool in df creation (#5309)
• fix and check all uninstalled imports in ci (#5304)

🛠️ Other improvements

• Add "import polars.testing" to testing docstrings (#5316) (#5318)
• streamline lazy imports (#5302)
• Catch deprecation warnings in unit tests (#5306)
• fix and check all uninstalled imports in ci (#5304)

Thank you to all our contributors for making this release possible!
@alexander-beedie, @ghuls, @ritchie46, @thatlittleboy, @universalmind303 and @zundertj