Add copy-to-csv header option

[acquamarin]

This PR adds an option to allow user to specify whether or not to write a header for the CSV file.

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (093e627) 90.54% compared to head (a373cae) 90.56%.
Report is 3 commits behind head on master.

Files	Patch %	Lines
...nclude/processor/operator/persistent/copy_to_csv.h	60.00%	2 Missing ⚠️
...de/processor/operator/persistent/copy_to_parquet.h	50.00%	2 Missing ⚠️
src/processor/operator/persistent/copy_to_csv.cpp	94.11%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2436      +/-   ##
==========================================
+ Coverage   90.54%   90.56%   +0.01%     
==========================================
  Files        1020     1020              
  Lines       36515    36533      +18     
==========================================
+ Hits        33064    33085      +21     
+ Misses       3451     3448       -3     

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