Removed need to pass encodings by value

[ritchie46]

array_to_columns could do with a slice as Encoding
is Copy

[codecov]

Codecov Report

Merging #1123 (f383506) into main (f57dbd5) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1123   +/-   ##
=======================================
  Coverage   83.38%   83.38%           
=======================================
  Files         367      367           
  Lines       35566    35566           
=======================================
  Hits        29658    29658           
  Misses       5908     5908           

Impacted Files	Coverage Δ
src/io/parquet/write/pages.rs	95.85% <100.00%> (ø)
src/io/parquet/write/row_group.rs	87.01% <100.00%> (ø)
src/array/binary/mod.rs	88.88% <0.00%> (-1.24%)	⬇️
src/io/ipc/read/stream_async.rs	76.69% <0.00%> (-0.76%)	⬇️
src/io/ipc/read/reader.rs	96.38% <0.00%> (ø)
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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