feat: Union types coercion

[gandronchik]

Which issue does this PR close?

Union columns with different types

closes#3467

[codecov-commenter]

Codecov Report

Merging #3513 (57962b9) into master (25c029c) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@ Coverage Diff @@## master #3513 +/- ##
==========================================
- Coverage 85.75% 85.74% -0.01% 
==========================================
Files 299 299 Lines 55311 55352 +41 ==========================================
+ Hits 47432 47462 +30 - Misses 7879 7890 +11 

Impacted Files	Coverage Δ
datafusion/core/src/physical_plan/union.rs	96.93% <100.00%> (+0.27%)	⬆️
datafusion/expr/src/expr_rewriter.rs	81.18% <100.00%> (+0.64%)	⬆️
datafusion/expr/src/logical_plan/builder.rs	90.37% <100.00%> (+0.20%)	⬆️
datafusion/sql/src/planner.rs	81.07% <100.00%> (+0.10%)	⬆️
datafusion/common/src/dfschema.rs	93.63% <0.00%> (-4.15%)	⬇️
datafusion/expr/src/logical_plan/plan.rs	77.68% <0.00%> (-0.17%)	⬇️
datafusion/common/src/scalar.rs	85.18% <0.00%> (+0.06%)	⬆️
datafusion/core/src/physical_plan/metrics/value.rs	87.43% <0.00%> (+0.50%)	⬆️
datafusion/expr/src/expr_schema.rs	63.47% <0.00%> (+0.59%)	⬆️

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[alamb]

Thanks @gandronchik -- I think this PR is looking really good.

The only thing I think is needed prior to merge is 2 more tests. ❤️ Thank you!

[gandronchik]

Thanks @gandronchik -- I think this PR is looking really good.

The only thing I think is needed prior to merge is 2 more tests. ❤️ Thank you!

Hi @alamb. Thank you for review. I added more tests and also fixed few bugs 🙏

[alamb]

This looks great -- thank you @gandronchik . I went over the tests carefully and 👍

[ursabot]

Benchmark runs are scheduled for baseline = f30fc4e and contender = 4b1e044. 4b1e044 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java