Exposed compression levels for parquet

[ritchie46]

export parquet expression levels to the public API.

[codecov]

Codecov Report

Merging #1041 (df50aaa) into main (4477126) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1041   +/-   ##
=======================================
  Coverage   81.42%   81.43%           
=======================================
  Files         360      360           
  Lines       34320    34320           
=======================================
+ Hits        27946    27949    +3     
+ Misses       6374     6371    -3     

Impacted Files	Coverage Δ
src/io/parquet/write/mod.rs	62.88% <ø> (ø)
src/array/physical_binary.rs	98.13% <0.00%> (+0.46%)	⬆️
src/io/ipc/read/stream_async.rs	74.38% <0.00%> (+0.82%)	⬆️
src/io/avro/write/schema.rs	77.08% <0.00%> (+2.08%)	⬆️

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