Move executors from FLoops to Transducers

[tkf]

Downstreams:

• [x] https://github.com/JuliaFolds/FLoops.jl/pull/59 (https://github.com/JuliaFolds/FLoops.jl/runs/1648543273)
• [x] https://github.com/JuliaFolds/FoldsCUDA.jl/pull/35 (https://github.com/JuliaFolds/FoldsCUDA.jl/pull/35/commits/146963ab624f1fbcb1a55c65916e38276e2ef1fe)
• [x] https://github.com/JuliaFolds/data-parallelism/pull/29 (https://github.com/JuliaFolds/data-parallelism/pull/29/commits/c37cdafa0168c55d0ef9c86256e0c3600a5aa406)

Commit Message

Move executors from FLoops to Transducers (#439)

This should go to FoldsBase (once it's created). But, until then (= until I'm convinced that the API is OK), in Transducers.jl is a better place to define this than FLoops.jl.

[codecov[bot]]

Codecov Report

Merging #439 (c9ebd52) into master (ff76d11) will increase coverage by 0.12%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #439      +/-   ##
==========================================
+ Coverage   91.64%   91.76%   +0.12%     
==========================================
  Files          26       27       +1     
  Lines        1819     1846      +27     
==========================================
+ Hits         1667     1694      +27     
  Misses        152      152              

Flag	Coverage Δ
unittests	91.76% <100.00%> (+0.12%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/Transducers.jl	91.66% <ø> (ø)
src/processes.jl	94.11% <ø> (ø)
src/executors.jl	100.00% <100.00%> (ø)

---

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 ff76d11...5a2e31f. Read the comment docs.