Cherry pick fix: Handle slices in unary kernel to active_release

[alamb]

Automatic cherry-pick of 7ae6910

• Originally appeared in fix: Handle slices in unary kernel #739: fix: Handle slices in unary kernel

[codecov-commenter]

Codecov Report

Merging #755 (47a311c) into active_release (9f7707c) will increase coverage by 0.00%.
The diff coverage is 83.33%.

@@               Coverage Diff               @@
##           active_release     #755   +/-   ##
===============================================
  Coverage           82.45%   82.45%           
===============================================
  Files                 167      167           
  Lines               46810    46820   +10     
===============================================
+ Hits                38598    38607    +9     
- Misses               8212     8213    +1     

Impacted Files	Coverage Δ
arrow/src/compute/kernels/arity.rs	86.36% <81.81%> (-5.31%)	⬇️
arrow/src/buffer/immutable.rs	97.84% <100.00%> (ø)
parquet/src/encodings/encoding.rs	94.67% <0.00%> (+0.19%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9f7707c...47a311c. Read the comment docs.