Add bitonic topk

[pfultz2]

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[codecov]

Codecov Report

Attention: Patch coverage is 52.50000% with 38 lines in your changes missing coverage. Please review.

Project coverage is 92.25%. Comparing base (879f306) to head (c5a34d0).
Report is 48 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/rewrite_reduce.cpp	5.00%	38 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3862      +/-   ##
===========================================
- Coverage    92.29%   92.25%   -0.04%     
===========================================
  Files          519      520       +1     
  Lines        22233    22506     +273     
===========================================
+ Hits         20520    20763     +243     
- Misses        1713     1743      +30     

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