refactor lexico sort for future code reuse

[jimexist]

Which issue does this PR close?

Re #428

Rationale for this change

the logic to sort a list of columns lexicographically given sort options was previously embedded within lexsort but this pull request changes to pull that part out to a generic struct for future code reuse.

This change is used in #424

What changes are included in this PR?

Are there any user-facing changes?

[jorgecarleitao]

Thanks @jimexist ! Ready to go in my opinion

[jimexist]

Thanks @jimexist ! Ready to go in my opinion

not sure what i can do about the docker build failures

[codecov-commenter]

Codecov Report

Merging #423 (a0ba084) into master (18c804a) will decrease coverage by 0.00%.
The diff coverage is 92.00%.

@@            Coverage Diff             @@
##           master     #423      +/-   ##
==========================================
- Coverage   82.64%   82.64%   -0.01%     
==========================================
  Files         162      162              
  Lines       44542    44549       +7     
==========================================
+ Hits        36813    36817       +4     
- Misses       7729     7732       +3     

Impacted Files	Coverage Δ
arrow/src/compute/kernels/sort.rs	94.90% <92.00%> (-0.23%)	⬇️

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[jimexist]

Thanks @jimexist ! Ready to go in my opinion

not sure what i can do about the docker build failures

seems like rebasing just solved this issue

[alamb]

seems like rebasing just solved this issue

I think that causes the tests to get re-run and thus if the error was due to some network glitch or something it will be solved by the re-execution