Clean up arrow code in node column chunk and copy node

[ray6080]

No description provided.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (e110344) 88.99% compared to head (b608e09) 89.57%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2104      +/-   ##
==========================================
+ Coverage   88.99%   89.57%   +0.58%     
==========================================
  Files         981      981              
  Lines       36067    35827     -240     
==========================================
- Hits        32097    32093       -4     
+ Misses       3970     3734     -236     

Files	Coverage Δ
src/include/storage/store/column_chunk.h	92.00% <ø> (+3.53%)	⬆️
src/include/storage/store/string_column_chunk.h	100.00% <ø> (ø)
src/include/storage/store/var_list_column_chunk.h	83.33% <ø> (+52.08%)	⬆️
src/processor/operator/persistent/copy_node.cpp	95.20% <100.00%> (+1.87%)	⬆️
src/storage/store/column_chunk.cpp	75.88% <100.00%> (+22.28%)	⬆️
src/storage/store/string_column_chunk.cpp	60.97% <ø> (+17.49%)	⬆️
src/storage/store/struct_column_chunk.cpp	28.04% <ø> (+9.19%)	⬆️
src/storage/store/var_list_column_chunk.cpp	79.62% <ø> (+28.43%)	⬆️

... and 3 files with indirect coverage changes

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