Removed O(N) clone in writing CSV

[jorgecarleitao]

This is only applicable to the serialize function.

[codecov]

Codecov Report

Merging #1128 (1b785ff) into main (81ab424) will increase coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1128      +/-   ##
==========================================
+ Coverage   83.37%   83.48%   +0.10%     
==========================================
  Files         367      367              
  Lines       35574    35573       -1     
==========================================
+ Hits        29661    29697      +36     
+ Misses       5913     5876      -37     

Impacted Files	Coverage Δ
src/io/csv/write/mod.rs	100.00% <100.00%> (+34.93%)	⬆️
src/io/ipc/read/schema.rs	94.88% <0.00%> (+0.31%)	⬆️
src/bitmap/immutable.rs	81.48% <0.00%> (+0.61%)	⬆️
src/io/ipc/read/reader.rs	96.75% <0.00%> (+0.72%)	⬆️
src/array/utf8/mod.rs	86.58% <0.00%> (+0.95%)	⬆️
src/bitmap/utils/slice_iterator.rs	98.78% <0.00%> (+1.21%)	⬆️

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